

from586.73QAR/ h
Foundations of Environmental Education , Introduction to Environmental Awareness, Action Sustainability and Environmental Education.
Dive into the fascinating world of discovery and exploration in our Science class! Students will investigate the principles of biology, chemistry, physics, and earth sciences, fostering curiosity about the natural world. Through hands-on experiments, collaborative projects, and critical thinking, learners will develop a strong foundation in scientific concepts and the skills to analyze, hypothesize, and solve real-world problems. Whether it's uncovering the mysteries of the universe or understanding the microscopic building blocks of life, this class ignites a passion for knowledge and innovation.
Our academic tutoring sessions are designed to provide personalized support for students across a variety of subjects and academic levels. Whether you're looking to improve your understanding of course material, prepare for exams, or refine your research and writing skills, we tailor our approach to meet your unique needs.
This English course is designed to help learners develop proficiency in reading, writing, speaking, and listening. Through engaging activities, interactive discussions, and practical exercises, students will enhance their grammar, vocabulary, pronunciation, and overall communication skills. The class focuses on real-life applications, including conversational English, writing for various purposes, and critical comprehension of texts.
Who is this class for?
Learners at [Beginner/Intermediate/Advanced] level seeking to improve their English.
Individuals preparing for academic, professional, or personal language goals (e.g., exams, job applications, or travel).
Key Features:
Dynamic lessons tailored to students' needs.
Focus on grammar, pronunciation, and vocabulary.
Real-world practice with role-plays, presentations, and discussions.
Regular feedback and assessments to track progress.
Class Outcomes:
By the end of the course, students will:
Communicate effectively in English in diverse contexts.
Write clear, coherent texts for various purposes.
Demonstrate improved listening and reading comprehension skills.
Gain confidence in using English in daily life or professional settings.
Our academic tutoring sessions are designed to provide personalized support for students across a variety of subjects and academic levels. Whether you're looking to improve your understanding of course material, prepare for exams, or refine your research and writing skills, we tailor our approach to meet your unique needs.
This English course is designed to help learners develop proficiency in reading, writing, speaking, and listening. Through engaging activities, interactive discussions, and practical exercises, students will enhance their grammar, vocabulary, pronunciation, and overall communication skills. The class focuses on real-life applications, including conversational English, writing for various purposes, and critical comprehension of texts.
Who is this class for?
Learners at [Beginner/Intermediate/Advanced] level seeking to improve their English.
Individuals preparing for academic, professional, or personal language goals (e.g., exams, job applications, or travel).
Key Features:
Dynamic lessons tailored to students' needs.
Focus on grammar, pronunciation, and vocabulary.
Real-world practice with role-plays, presentations, and discussions.
Regular feedback and assessments to track progress.
Class Outcomes:
By the end of the course, students will:
Communicate effectively in English in diverse contexts.
Write clear, coherent texts for various purposes.
Demonstrate improved listening and reading comprehension skills.
Gain confidence in using English in daily life or professional settings.
Extra information
Bring your own laptopLocation
Online via webcam
About Me
Meet Darlington, a passionate environmental advocate and educator.With a background in Pollution and Waste Management (BSc) and Environmental Education (MSc), Darlington has been lecturing at the University of Calabar, Department of Environmental Management, Faculty of Environmental Science- Nigeria
Currently, he is pursuing his PhD in Geoscience, focusing on building energy security through localized sustainable resources in Nigerian communities. His research aims to promote sustainable development and community resilience.
With a strong commitment to environmental stewardship, Darlington is dedicated to inspiring positive change through education and research.
Education
BSC DEGREE: University of calabar, Second Class Upper Division 3.86MSC DEGREE: University of calabar, Distinction
PhD in view: University of Aberdeen Scotland.
Experience / Qualifications
EMPLOYMENT HISTORYLecturer (Climate Change/Environmental Education/Pollution) August 2017 – Till Date
University of Calabar, Nigeria
Collaborating with faculty members and academic leaders to develop curriculum materials and resources for research-related courses and programs.
Delivering lectures, conducted workshops, and provided individualized instruction to students.
Developing lesson plans, curriculum materials, and instructional resources tailored to the needs of students.
Conducting research and teaching, focusing mainly on renewable energy, climate change, pollution and environmental education, human ecology, environmental impact assessment, human ecology etc.
Engaging students and promoting intellectual curiosity through hands-on teachings and presentations.
Evaluating and revising lesson plans and course contents to achieve student-centred learning.
Participated in students and faculty events to highlight program offerings, engage students and increase profile on campus.
Shifted between informal and formal teaching methods to create a multilayered web of learning.
Prepared individualised lesson plans and educational materials to structure the curriculum to each student’s needs.
Maintained regularly scheduled hours to assist and advise students on academic plans.
Used variety of learning modalities and support materials to facilitate learning process and accentuate presentations.
Encouraged class discussions by building discussions into lessons, actively soliciting inputs, asking open-ended questions and using techniques to track student participation.
Maintained regularly scheduled hours to assist and advise students on academic plans.
Compiled reading lists and other relevant assignments to bolster student understanding of class concepts.
Kept online classroom experience consistent and focused on learning by establishing and enforcing clear objectives.
Compiled, administered and graded examinations to assess student learning and identify individual needs.
EDUCATIONAL QUALIFICATIONS
University of Aberdeen – PhD Geoscience (in-view)
University of Calabar – M.Ed. Environmental Education (Distinction)
University of Calabar – B.Ed. Environmental Education (Second Class Honors, Upper Division)
PROFESSIONAL & PERSONAL DEVELOPMENT
Faculty Collaboration
Academic Research
Thesis and dissertation supervision
Students Counselling and classroom management
Scientific publications in Peer-reviewed journals
Students Outcome Management
Learning Management Systems
Microsoft Productivity Suite
AREAS OF RESEARCH INTEREST
Climate Change Impacts
Renewal Energy
Ecological Interactions
Pollution
Environmental Education
Ask a question
Send a message explaining your needs and Darlington will reply soon:
The more detail, the better.
Ex. "Hi, when are you available to meet for a lesson?"
Ex. "Hi, when are you available to meet for a lesson?"
Availability of a typical week
(GMT -04:00) New York
Mon | Tue | Wed | Thu | Fri | Sat | Sun | |
---|---|---|---|---|---|---|---|
0 | |||||||
1 | |||||||
2 | Thursday at 2:00 | ||||||
3 | Friday at 3:00 | ||||||
4 | Saturday at 4:00 | ||||||
5 | Sunday at 5:00 | ||||||
6 | |||||||
7 | |||||||
8 | |||||||
9 | |||||||
10 | |||||||
11 | |||||||
12 | |||||||
13 | |||||||
14 | |||||||
15 | |||||||
16 | |||||||
17 | |||||||
18 | |||||||
19 | |||||||
20 | |||||||
21 | |||||||
22 | |||||||
23 |
from 586.73 QAROnline via webcam
100% Satisfaction Guarantee
Good-fit Instructor Guarantee
If you are not satisfied after your first lesson, Apprentus will find you another instructor or will refund your first lesson.
Online reputation
- Instructor since December 2024
Availability of a typical week
(GMT -04:00) New York
Mon | Tue | Wed | Thu | Fri | Sat | Sun | |
---|---|---|---|---|---|---|---|
0 | |||||||
1 | |||||||
2 | Thursday at 2:00 | ||||||
3 | Friday at 3:00 | ||||||
4 | Saturday at 4:00 | ||||||
5 | Sunday at 5:00 | ||||||
6 | |||||||
7 | |||||||
8 | |||||||
9 | |||||||
10 | |||||||
11 | |||||||
12 | |||||||
13 | |||||||
14 | |||||||
15 | |||||||
16 | |||||||
17 | |||||||
18 | |||||||
19 | |||||||
20 | |||||||
21 | |||||||
22 | |||||||
23 |
from 586.73 QAROnline via webcam
Good-fit Instructor Guarantee
If you are not satisfied after your first lesson, Apprentus will find you another instructor or will refund your first lesson.
Share
You are here
Similar classes
Arno
Mathematics Physics Chemistry Latin Greek Portuguese Spanish French Italian Dutch English GermanSince the Gymnasium I give tutoring Mathematics, Physics, Chemistry, Latin and language courses Latin languages Portuguese Spanish French and Italian from basic or beginner level to Gymnasium level. For primary school students also arithmetic for example with fractions and percentages and all other modules. Also Dutch grammar and spelling.
Phillip
English conversation classes for adults and teens by an American living in IrelandThis English conversation and grammar course is designed for adults and teenagers. My main goal is to help you progress in this language at your own pace. Whether it is to acquire the basics of English, improve your language skills with a view to traveling, moving to an English-speaking country, or for your professional development, I adapt to your specific needs and objectives.
I am bilingual in English and French, with Irish-American heritage, and have dedicated the last twenty years to providing academic support, whether for children aged 4 and up or seniors over 85 years ! It's never too late to improve your language skills.
As an experienced entrepreneur for many years, I also have training in education and socio-cultural activities. My educational approach is based on adaptability and personalization, in order to offer you an optimal learning experience.
Please feel free to contact me to discuss your language needs and specific goals. I look forward to helping you achieve your English aspirations!
Benoit
Private online mathematics lessons - Qualified and experienced teacherI am a qualified and experienced mathematics tutor. Graduated from the Free University of Brussels in 2011, I started my career by teaching remedial courses in different schools in Brussels. I then specialized in individual academic support by following educational training at the Harvard Graduate School of Education. I have been giving private mathematics lessons daily for over ten years.
The students who follow my private lessons benefit from personalized support. The first session is devoted to an in-depth assessment of the student's mathematical knowledge. The objective is to detect its weak points and understand their origin in order to adapt my courses to its needs. I develop a tailor-made remediation program for each of my students aimed at filling each of their gaps. Over the course of the sessions, the student builds a solid foundation for learning and regains self-confidence. At the same time, I help him acquire a work methodology that allows him to gradually become autonomous in his studies.
I have a perfect knowledge of the mathematics program of the College and the High School (from the Sixth to the Terminale). During my formative years, I studied and developed many techniques that make it easier to learn math. The strength of my pedagogical approach lies in my ability to explain in a simple way everything that the student finds complicated. I am passionate about this job because it gives me the opportunity to guide dropout students on the path to success. It is a real pleasure to see them evolve and come to terms with the fantastic world of mathematics.
I provide my private lessons in Limoges (at the student's home) or remotely (online via the internet). My distance learning courses take place on an interactive online whiteboard. This board is specially designed to promote student/teacher interaction on the internet. Thanks to this educational tool, my online courses are as effective as home courses. The student only needs an internet connection and a computer, tablet, or smartphone to take advantage of it.
Jaume
SPANISH APPENDICES FOR BEGINNERS AND / OR ADVANCED PERSONSLearn Spanish in an interactive and personalized way!
Do you want to learn Spanish or improve your current level? In my lessons I adapt completely to your goals, level and learning pace. As a native Spanish speaker and experienced teacher in language schools I provide authentic and effective lessons.
In the lessons we will cover:
Grammar and vocabulary: In a structured and understandable way.
Practical exercises: Focused on speaking, listening, writing and reading.
Personal attention: Each lesson is tailored to your needs.
Whether you are a student who needs extra help or an adult who wants to become fluent in Spanish, I would love to help you achieve your goals.
Send me a message for more information or to schedule a trial lesson. ¡Hasta pronto!
Nesrine
🥇Learn written and spoken English quickly with our professional tutors, and obtain native-like skills!The objective is that: the learner masters the English language (🎧listening-comprehension,🎤 conversation, 📚 reading, grammar-pronunciation, writing...). It helps him to have language skills like native speakers. 🥇
At the same time, the learner will be 🚴♀️dynamic and well supervised by professional tutors who listen.
The atmosphere is distinguished: 🔥learning, interaction, no routine, no stress.
The learning tools used; videos, audios, texts, articles, images, games, stories...
We are happy to help both adults and pupils/students. If you want to learn the English language (reading, grammar, oral conversation, written production,...) or you have homework to do, or competitions/tests to take, 🏆 contact us :)
Florencia
General English, English for work/study/travel/examsI have 10 years of experience as an English tutor. I am certified and have worked with students of all ages and levels.
-Are you traveling as a tourist or to live in another country?
- Do you work with technical English such as IT, Medicine, Kinesiology, Health, Accounting, scientific areas, Marketing and Business?
- Do you have daily meetings?
- Do you participate in conferences?
- Do you need to prepare your CV and interviews?
- Do you need to prepare for international exams, such as IELTS, FCE and CAE?
-Do you write scientific articles in journals?
-Are you going to apply for a student VISA in an English-speaking country?
-Are you going to study at a foreign university?
I can help you create a plan and work on your weaknesses and goals!
1:1 lessons or small groups (ask about rates)
Materials provided
Continuous feedback
Dynamic and fun
Your Bridge to Spanish Communication and Understanding Locals in Spanish-speaking countries!
I just love seeing my students being able to communicate their ideas in my language
Start YOUR journey with me :)
Mohamed
Preparation for competitive entrance exams for major higher education establishments (physics, chemistry) ENSA, ENSAM, ENA, ENAM, IAV, medicine.Physics and chemistry are the gateway to understanding all sciences, as a science student you will need to be able to sort through the many complex features to become a true student scientist with a critical and curious mind. That's why I designed this course to help students prepare for their exams and the next school year to fill in the gaps they have in math and science.
I would like to inform you that I am a young researcher and I can also help you to acquire basic knowledge of Microsoft Office and other essential software for your career.
Irma
Dutch lessons at any level.The most important thing for me is that we have fun while learning – that makes everything a lot more fun! In the lessons I am happy to help you with your questions about Dutch grammar and we can work together on your speaking, writing and/or listening skills. Do you have homework that you need help with? That is of course also possible!
Let me know what level you are at now and what you would like to learn. I would love to challenge you, but make sure it is always fun and that you don't have too much at once.
The prices stated are for a lesson for 1 person.
Justin
Professional & Academic English with American Instructor and JournalistI am a native American English speaking instructor, editor, journalist, and legal/policy expert from Florida specializing in instruction, interview and exam prep, consulting and text correction for a wide range of professionals & students across Belgium including in the legal, academic, policy, and other fields.
My past & present clients have included: professionals and politicians from all four major EU institutions, the Belgian government, the UNHCR, and various NGOs, alongside diplomats, doctors, journalists, and engineers, as well as a variety of other professions in addition to traditional students..I have had over 50+ repeat students on Apprentus (which recently changed their algorithm to only display the last six months).
Approaching from a true native's perspective, I instruct and assist with both educational and business English in a multi-faceted nature covering a wide range of areas including comprehension, conversation, grammar, and situational skills, in addition to working on general language skills and accent training. As well, I can provide extensive help and training with the EPSO, IELTS, and TOEFL exams.
I have also written, edited or proofread a variety of academic papers, theses, applications, CVs, and other documents for numerous satisfied academic and professional clients.
I have spent my entire childhood and adult life in the United States before completing a master's degree in Political Science and European Politics at KU Leuven. Additionally, I also possess Bachelor's degrees in Political Science and History. I have an extensive knowledge and experience of English grammar and literature, as well as current and past working experience in journalism (Anti-Competition Law and European Policy at the Policy and Regulatory Report) and both European and American politics.
I also handle correction of text, editing, proofreading and ghostwriting, with weekly and monthly rates possible. My transportation costs are included.
Abir
English lessons for children and teenagers (english lessons)Hi everyone! 👋
I’m Abir, a passionate and experienced English teacher from Tunisia. 🇹🇳 My goal is to help children and teenagers master English in a fun, interactive, and motivating way.
🎯 What Can I Offer?
📚 Simple and enjoyable lessons tailored to your child’s level and learning needs.
🗣️ A strong focus on improving speaking skills and building confidence.
✏️ Activities to boost grammar, vocabulary, and comprehension.
💡 Personalized methods that keep your child engaged and motivated!
✨ Why Choose My Lessons?
I believe that every child can excel in English when they enjoy the process. 🌟 I provide a positive, encouraging environment where learning feels natural and rewarding. Together, we’ll unlock their full potential!
📍 Location
🖥️ All lessons are conducted online via webcam, so your child can learn from the comfort of home.
📩 Ready to give your child a head start in English? Contact me now to schedule their first lesson! Let’s make learning English a joyful adventure! 🚀
Nouhaila
Take your ENGLISH to the next level with grammar lessons, conversation and practical exercises for real life!Take your English to the next level with grammar lessons, conversation and practical exercises for real life!🇬🇧
✨ Do you like English and want to improve it? You've come to the right place!
✨ Native and certified teacher with over 3 years of experience, ready to help you learn with confidence and fluency.
✨ Whether it's for travel or business, it won't be a challenge anymore!
✨ 100% success! You could be the next one to improve your English!
My name is Nouhaila, an English teacher based in Belgium, with a Master's degree in English Teaching and a Cambridge Examiner certification. I am ready to make learning fun and engaging! This course is 100% conversation-oriented. You will be able to practice in a relaxed and friendly environment, learning naturally and effectively 🌟🌟 I will provide you with personalized feedback 📝 to correct your mistakes in real time, improve your pronunciation and enrich your vocabulary. Whatever your level, everyone is welcome! 🎉
Currently pursuing a PhD in Applied Linguistics with a specialization in Sociolinguistics and Pragmatics, I understand the challenges of language learning. Passionate about teaching English, I offer a new course for those who want to improve their conversation skills, as well as grammar/conversation classes to master English language structures.
Don't miss this opportunity to improve your English! 🚀
*For beginners, my regular classes cover grammar and conversation for overall progression. This class is all about fluency!
---
【Course for Travelers】✈️✈️✈️✈️✈️
🌍 Learn the basics for worry-free travel.
🌍 Useful vocabulary and phrases for all your adventures.
🌍 Discover the culture of English-speaking countries.
🌍 Get ready to explore the world with confidence!
【Conversation Course】💬💬💬💬💬
💥 100% conversational classes—Talk, talk, talk!
💥 Topics: Culture, travel, work, news, and more!
💥 Improve your pronunciation with fun exercises.
💥 Do you lack confidence in small talk? With me, you will learn to speak fluently!
【Business English】💼💼💼💼💼
📈 Strengthen your English for the professional environment.
📈 Specific vocabulary and expressions for professionals.
📈 Courses tailored to presentations, meetings and negotiations.
📈 Boost your career with English!
---
【General English】📝📝📝📝📝📝
✨ All levels, from A1 to C2, adapted progression.
✨ Grammar and conversation in every class!
✨ Cambridge standards-based curriculum for optimal learning.
✨ New themes each session to expand your vocabulary, grammar and speaking skills.
✨ Do you like homework? Practice at home with listening activities, vocabulary games, and writing exercises!
✨ Ready to take your English to the next level? Let’s get started now!
【Exam Preparation】🎓🎓🎓🎓🎓
🎯 Certified Cambridge examiner to guide you every step of the way.
🎯 Strategies and exercises for the Cambridge and TOEFL exams.
🎯 Boost your confidence with personalized lessons for exam day.
🎯 Do you want to pass your exam? I'll support you every step of the way!
---
Need equipment?
✨ All materials are included. I will also send you personalized materials, with presentations, practice tests, homework and writing exercises.
✨ By booking 20 classes, you will have access to an online classroom to organize all your sessions.
.....
Learn English at the same level with grammar classes, conversation and practice in real situations! 🇬🇧
✨ Do you love the English and want to improve? It's the correct place! ✨ Certified native teacher with more than 3 years of experience, list to help you learn with confidence and fluency.
✨ ¿Viajes o negocios? ¡There will be no return! ✨ 100% satisfaction! You can be close to better English!
I am Nouhaila, a professor of English in Belgium, with a master's degree in English teaching and examination certification from Cambridge. This is what you need to do to entertain and motivate learning. This course is 100% focused on the conversation. Practicarás in a relaxed and friendly environment, learning natural and effective form 🌟🌟 You will receive personalized feedback 📝, you will be able to correct errors in real time, improve your pronunciation and amplify your vocabulary. ¡If you import your current level, all are welcome! 🎉
Currently I am achieving a doctorate in applied linguistics, with specialization in sociolinguistic and pragmatic, because I understand the difficulties of learning languages. Aside from teaching English, we offer this new course to help you improve your conversation, in addition to grammar/conversation classes to dominate the English structures.
¡No stones are suitable for reading in English at the following level! 🚀
*If you are an principiant, you may prefer regular courses with grammatical skills and balanced conversation. This course is focused on improving fluidity!
【English for Viajeros】✈️✈️✈️✈️✈️ 🌍 Learn the necessary route without problems. 🌍 Vocabulary and useful phrases for your adventures. 🌍 Discover the culture of English-speaking countries. 🌍 Prepare to explore the world with confidence!
【Conversation Class】💬💬💬💬💬 💥 100% conversation-centered course—Habla, habla, habla! 💥 Topics: culture, routes, work, actuality and more. 💥 Better pronunciation with entertaining activities. 💥 Are you falsely confident in small conversations? Please learn how to learn with solutions.
【English for Negotiations】💼💼💼💼💼 📈 Improve your English for the labor environment. 📈 Vocabulary and specific professional expressions. 📈 Personalized files for presentations, meetings and negotiations. 📈 ¡Impulsa tu carrera con el inglés!
【English General】📝📝📝📝📝 ✨ All levels, from A1 to C2, advance gradually. ✨ Grammatics and conversation in every class. ✨ Program based on Cambridge standards for optimal learning. ✨ New topics in each session to improve your vocabulary, grammar and oral expression skills. ✨ ¿Te gustan las tareas? Practice at home with learning activities, vocabulary in Quizlet/Wordwall and writing exercises. ✨ List to read your English at the same level? ¡Empecemos ya!
【Preparation for Exams】🎓🎓🎓🎓🎓 🎯 Examinadora certificada de Cambridge que tu guiará en cada paso. 🎯 Strategies and exercises for Cambridge and TOEFL exams. 🎯 You can trust us with personalized classes for the exam day. 🎯 Who are you looking for in your exam? ¡Estoy aquí para ayudarte en cada paso!
Do you need material?
✨ All material is included. You also envy personalized recursos, including presentations, practical tests, tasks and writing exercises. ✨ When you reserve 20 classes, you will have access to a virtual room to organize all your sessions.
Thad
English Tutor Committed To Meeting Your Tutoring NeedsHello all! I'm Thad and I am here to tutor you in English. I'm an American expat living in Egypt, TEFL/TESOL certified, and have helped people from around the world better their English skills. It is best that you already have a grasp on English as a second language. Sessions are available Sundays-Thursdays from 1-6pm Egypt time. I look forward to hearing from you!
Kathline Martika A
Say goodbye to boring lessons! Learn English like you’re chatting with a friend — fun, easy & confidence-boosting!With a TEFL certification, experience teaching both children and adults, and a strong foundation in communication and cultural awareness, I bring an engaging and adaptable teaching style that meets learners where they are and inspires growth.
My background spans classroom support, sports therapy, customer service, and traffic management — all roles that demanded clarity, patience, and people-first communication. I’ve now committed fully to teaching English online, and I’m seeking students where I can deliver high-impact lessons and continue evolving as an educator.
Driven, empathetic, and always improving — I’d be honored to contribute to your mission and bring value to your learning.
Ava
Conversational English (children, adults)My Conversational English class is designed to help learners build confidence and fluency in real-life communication. The focus is on natural spoken English, active listening, pronunciation, and practical vocabulary for everyday situations.
I create a relaxed, supportive environment where students can express themselves freely, improve their speaking skills, and expand their range of vocabulary and idiomatic expressions. Lessons are interactive and personalized, covering a wide range of topics such as travel, work, culture, daily routines, and social issues.
🔹 Key Features:
Emphasis on fluency, clarity, and natural expression
Role-plays, discussions, and real-world scenarios
Pronunciation, intonation, and listening practice
Vocabulary building and correction of common errors
Flexible topics based on student interests and goals
🎯 Goals:
Increase speaking fluency and conversational confidence
Improve pronunciation and listening comprehension
Build vocabulary for social, professional, and casual conversations
Muhammad Fatkhul
Improve Your English – Friendly and Structured Online ClassesThis class is designed for teens and adults who want to improve their English as a Second Language (ESL) whether you're just starting out or looking to become more confident in speaking, listening, reading, or writing. The lessons are customized to match your goals and level.
We’ll work on:
-Everyday conversation and pronunciation
-Grammar and vocabulary building
-Listening and speaking practice
-Reading and writing skills
Indonesian version:
Kelas ini dirancang untuk remaja dan dewasa yang ingin meningkatkan kemampuan Bahasa Inggris sebagai Bahasa Kedua (ESL). Apakah kamu baru memulai atau ingin lebih percaya diri dalam berbicara, mendengar, membaca, atau menulis, setiap pelajaran akan disesuaikan dengan tujuan dan level kamu.
Kita akan mengerjakan:
-Percakapan sehari-hari dan pengucapan
-Peningkatan tata bahasa dan pengembangan kosakata
-Latihan mendengar dan berbicara
-Keterampilan membaca dan menulis