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23814 private teachers in Wbsl

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23814 private teachers in Wbsl

Piano · Music theory
Trusted teacher: Lesson Plan: Enthalpy Changes in Chemical Reactions Grade/Level: Secondary / IGCSE / AS level Duration: 60 minutes Topic: Enthalpy Changes in Reactions Lesson Objectives By the end of the lesson, students should be able to: 1. Understand that chemical reactions are accompanied by enthalpy changes, which can be exothermic or endothermic. 2. Construct and interpret reaction pathway diagrams, showing enthalpy change and activation energy. 3. Define and use key terms: standard conditions (⦵), enthalpy change of reaction (ΔHr⦵), formation (ΔHf⦵), combustion (ΔHc⦵), and neutralisation (ΔHneut⦵). Lesson Breakdown (60 minutes) 1. Introduction (5 minutes) Begin with a real-life hook: Ask: “Why does burning wood release heat, but dissolving ammonium nitrate in water feels cold?” Link to lesson: These are examples of exothermic and endothermic reactions. 2. Theory: Enthalpy Changes (10 minutes) Define enthalpy (H): The heat content of a system at constant pressure. Define enthalpy change (ΔH): Heat energy transferred during a reaction at constant pressure. Distinguish: Exothermic reaction: ΔH is negative (heat released). Endothermic reaction: ΔH is positive (heat absorbed). Give simple examples: Exothermic → combustion of methane. Endothermic → thermal decomposition of calcium carbonate. 3. Reaction Pathway Diagrams (15 minutes) Draw and explain two diagrams: Exothermic pathway: Products lower in energy than reactants, ΔH negative. Endothermic pathway: Products higher in energy than reactants, ΔH positive. Introduce activation energy (Ea):Minimum energy needed for reaction to occur. Label diagrams clearly: Reactants → peak (activation energy) → products. Highlight ΔH and Ea. 4. Standard Conditions and Key Enthalpy Terms (15 minutes) Explain standard conditions (⦵): 298 K (25°C), 101 kPa pressure, substances in standard states. Define and discuss: Standard enthalpy change of reaction (ΔHr⦵): Heat change when reaction occurs in molar quantities under standard conditions. Standard enthalpy of formation (ΔHf⦵): Heat change when 1 mole of compound is formed from its elements in their standard states. Standard enthalpy of combustion (ΔHc⦵):Heat change when 1 mole of substance is completely burnt in oxygen under standard conditions. Standard enthalpy of neutralisation (ΔHneut⦵): Heat change when an acid and alkali react to form 1 mole of water under standard conditions. Use simple examples for each (e.g., combustion of methane, formation of H2O, neutralisation of HCl with NaOH). 5. Guided Practice / Mini Activity (10 minutes) Students sketch their own reaction pathway diagrams (exothermic and endothermic). Label ΔH and Ea. Pair discussion: “Why do we still need activation energy even for exothermic reactions?” 6. Exercise (Homework / Classwork) (5 minutes) Answer the following questions: 1. State whether each reaction is exothermic or endothermic: a) Burning propane gas in oxygen. b) Photosynthesis in plants. c) Dissolving anhydrous copper(II) sulfate in water. 2. On a reaction pathway diagram: Show ΔH and Ea for an endothermic reaction. 3. Define the following terms and give one example each: a) Standard enthalpy of formation (ΔHf⦵) b) Standard enthalpy of combustion (ΔHc⦵) c) Standard enthalpy of neutralisation (ΔHneut⦵) 4. Under standard conditions, the enthalpy of combustion of methane is –890 kJ mol−1.
Chemistry
Trusted teacher: The skype courses are optimized thanks to the fiber and by a high definition web camera, which allows a course in optimal conditions. Plastic arts course, college and high school, plastic arts baccalaureate file. ST2A applied arts course, pre-competition by skype. Initiation or improvement in the different techniques of drawing and painting, observation drawing, portrait, study of perspective followed by urban sketches outside, travel diary and watercolor. Portrait technique, sketches of characters, perspective, using the various drawing tools pencil, charcoal, red chalk, markers and watercolors. The basics and improvement of oil painting. The basics of fundamental drawing adapted to children and adolescents with pedagogy, adapted to the rhythms and to the sensitivity of each one. Experience with children from 6 years old and adolescents in private lessons and for institutions. Applied arts course, preparation for the applied arts baccalaureate and preparation, plastic arts baccalaureate file. MANA from applied arts schools, professional bac. The courses are adapted according to the levels and the expectations of the pupils, a pedagogical progression will be developed. Professional artist, with 20 years of experience, exhibition in Parisian galleries. 17 years of experience in teaching adults within a works council of a large company. Preparation for competitions: Fine arts, Applied arts. Applied Arts upgrade. Follow-up in bac ST2A, preparation for competitions: Gobelins, Max. Vox ... School of Fine Arts in Paris. Plastic arts option tray folder
Drawing & sketching · Painting
Computer science · Computer programming
Piano · Jazz music · Music theory
Trusted teacher: 🧪 IB Chemistry Apprentice Lesson Plan Topic: The Electromagnetic Spectrum Level: IB Year 1 (Apprentice) Duration: 60 minutes Lesson Objectives By the end of this lesson, students should be able to: ‣ Describe the electromagnetic spectrum and identify its different regions. ‣ Understand and apply the equation c = fλ. ‣ Differentiate between a continuous spectrum and a line spectrum. ‣ Explain the concept of quantized energy in atoms. Lesson Outline Introduction (0–5 minutes) Start the lesson by asking students a few engaging questions: What are some examples of invisible light or radiation around us? Why do we wear sunscreen? Allow brief responses, then explain that all of these examples are part of the electromagnetic spectrum, which we will study today. Teaching Phase 1 – Overview of the Electromagnetic Spectrum (5–15 minutes) Introduce the electromagnetic spectrum. Explain that it is a range of all electromagnetic waves, which vary by frequency and wavelength. Emphasize that all electromagnetic waves travel at the same speed in a vacuum – the speed of light, c = 3.00 × 108 m/s. Key formula to introduce: c = fλ, where: c = speed of light f = frequency (Hz) λ = wavelength (m) Point out that high-frequency waves have short wavelengths and higher energy (like gamma rays), while low-frequency waves have long wavelengths and lower energy (like radio waves). Display a spectrum diagram showing the range from radio to gamma rays, with visible light in the center. Teaching Phase 2 – Spectrum Types: Continuous vs. Line Spectrum (15–25 minutes) Explain the difference between continuous and line spectra. A continuous spectrum** contains all wavelengths in a range, like a rainbow produced when white light passes through a prism. A line spectrum** shows only specific wavelengths or frequencies. This happens when excited electrons fall back to lower energy levels and release photons of specific energies. Explain that energy is **quantized**—electrons cannot have just any amount of energy; only specific values are allowed. Use the helium line spectrum image as an example. Real-World Examples and Class Discussion (35–45 minutes) Give students three practical examples and discuss their uses: 1. Microwaves – Used in cooking and communications. 2. Ultraviolet (UV) rays – Cause sunburn; used in sterilizing equipment. 3. Gamma rays– Used in cancer treatment and in detecting radioactive materials. Ask students: Where do you see or use electromagnetic waves in your daily life? Encourage short contributions to reinforce understanding. Student Exercises (45–55 minutes) Have students complete these three questions individually: 1. A wave has a frequency of 6.0 × 1014 Hz. Calculate its wavelength using c = 3.00 × 108 m/s. 2. Explain the difference between a continuous and line spectrum, with an example of each. 3. Why are gamma rays more dangerous to humans than radio waves? Wrap-Up and Recap (55–60 minutes) Call on a few students to briefly summarize one key thing they learned.
Chemistry
Trusted teacher: ➤Choose the appropriate mediator to carry out quality work and help each other move forward/overcome certain mechanisms. An awareness necessary for change will then make it possible to be part of a new dynamic of life, to calm down and to use all its potential in the emotional/family/professional domains. ➤ Self-exploration in order to free oneself from emotion through speech and action / application, involves questioning oneself, analyzing, taking distance, and understanding the issues / points causing suffering or distress, before finally freeing oneself from them. This is intended to promote significant changes in cognitive, emotional or behavioral functioning. ➤This methodological approach, halfway between first practical behavioral coaching in an 'Anglo-Saxon' style and then psychoanalysis accompanied by a dedicated specialized psychoanalyst psycho-practitioner, is based precisely on precise questioning techniques, offering help in finding solutions, mastering new ways of envisaging/dealing with/perceiving difficulties, then implementing actions to be carried out. Combining the advantages of the two approaches and choosing the appropriate mediator to carry out quality work and help each other move forward/overcome certain mechanisms, will therefore induce the awareness necessary for this decided change, towards a new dynamic. ➤Objective? Understand the mechanisms of induced thought & emotion, linked to given everyday situations and which involve blockages. Then act concretely thanks to pragmatic techniques / methodological approaches from coaching, adapted to your situation to regain power over your life. ➤To lead this change & realize these aspirations, a cohort of concrete tools are at our disposal, but which involve deepening self-exploration. To question yourself, analyze, take some distance & understand the issues / problematic points, before finally freeing yourself from them through action. ➤Examples of themes/problems regularly dealt with & which are the subject of dedicated specialized support, adapted to your plan: •Self-confidence, self-esteem/assertion, shyness, decision-making, personal development •Management of emotions & suffering expressed in the form of anxieties, depressive disorders, embarrassments, addictions, relationship difficulties, phobia, stress, anger, anxiety, negative thoughts, panic, depression but also modification of behaviors harmful to good -being (post-traumatic stress, injuries, dependencies, addictions, etc.) • Disorders of school/professional relations (tensions, (re)orientation, pressures & conflicts) Program and personal (family, romantic, friendly, emotional) & social (loneliness, communication difficulties generating pain/frustration) • Problem of concentration, procrastination, organization, professional efficiency, time management •Management of a past trauma of which you are the victim (...) ➤At the start, it is always a question of knowing the triggers that led you to get support and knowing what you hope to accomplish with this follow-up. ➤With specific techniques that have proven themselves & adapted to your case and through a methodological approach and pragmatic tools, the purpose involves on the one hand an exploration of oneself through psychoanalytic tools and on the other hand concrete actions, as is the essence of coaching which bears fruit from the first sessions, by making you autonomous. ➤Influenced by cognitive & behavioral therapies, by Anglo-Saxon coaching instruments & the European methodology of applied psychoanalysis, the approach therefore aims to seek links between current difficulties and past experiences, including repressed and unresolved conflicts and to confront difficulties that may be partially related to inappropriate thoughts or behaviors learned/adopted often in spite of oneself. ➤And if cookie-cutter advice is precisely not offered, that you will never be judged or directed but heard and guided, in a process of permanent/interactive co-construction...it is precisely because it is important beforehand to analyze together, to become aware, to study jointly, to deepen, to decode your blockages & your initial problem to clarify your aspirations. ➤ So, how does a session take place? After an initial inventory, 'diagnostic'/exploratory contact during which your expectations are examined, your problem, your blockages, your needs and objectives identified, it is a question of analyzing them together then changing perspective/approach, considering 'the impasse' differently, think differently about the difficulties, gradually get out of your comfort zone thanks to a series of pragmatic suggestions/reflections/actions to be applied, according to a line of work defined together, anchored in a relationship of benevolent trust. ➤ So, to develop coherent solutions in a living, authentic and assertive life, inspired by our intuition and elements of positive psychology, this individual support helps to: - create a clear picture of your desired future and your individual journey - activate your unique resources and strengths - transform inner insecurity into confidence in order to focus your inner power - broaden your scope - use your gifts to co-create the transition to a vital and vital way of life in harmony with nature. Concretely, a SESSION = REFLECTION + SOLUTIONS, with a readjusted strategy if necessary. ➤ THE COACH PSYCHOANALYST PSYCHOPRACTITIONER Trained at the Grande Ecole post-preparatory classes & Ivy League University in the United States, our psycho-practitioner psychoanalyst has specialized and worked for more than 15 years, in Europe and North America, in the field , in renowned public and private international establishments, regularly participating in forums and conferences, and also offering personalized INDIVIDUAL support. ➤ PLACE, TIMETABLE, PRICES ✓ Locations: Geneva-Lausanne-Fribourg-Zurich-Neuchâtel-Lugano-Montreux-Basel-Neuchâtel-Bern-Lucerne-Brussels-Luxembourg-Paris-Lyon. But currently, these sessions continue to be offered by videoconference in the current context and in accordance with general demand which is almost unanimous on this subject. ✓ Indeed, apart from the classic advantages of videoconferencing (time saving related to travel & their unforeseen events, eco-responsibility, increased schedule flexibility, etc.), the quality of the session & the interaction remain identical. In addition, the entire exchange, notes and recommendations are immediately transcribed on the dedicated chat. ✓ To support us among ourselves & to be pleasant to you in this sustainable / particular period and in a spirit of solidarity, the fees are temporarily reduced and will not increase after the start of our sessions. ✓ Languages: French/English. ✓ The progress following these private sessions is perceptible from 1 to 2 sessions (*2024 study). ✓ As other people do regularly, you can also please your loved ones by offering gift vouchers available all year round. CONTACT / PROGRAM ✓ First contact on the site. ✓ A la carte program: evaluated and adapted to each need.
Life coaching · Self-improvement · Psychology
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Leonid - Kiev$28
Keyboard (music) · Piano · Music theory
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Mathematics, Statistics and English Tutoring at Various Levels (The Hague)
Natalia
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I have been working with Natalia for quite a while now and I can say every class with her is enlightening, fun, and most importantly super helpful. I study Statistics with her, and it is not at all my strong suit, however, Natalia made it possible for me to pass courses that otherwise I would have not been able to pass. I would 100% recommend her to anyone who is struggling or would like to improve.
Review by SZOFI
FLE French course - tutoring - FOS (French objective) - I deliver French lessons to children, teens and adults. (Auderghem)
Jérôme
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I have really enjoyed my classes with Jérôme! I really appreciate Jérôme's structured way of teaching, where I will always know the next steps of the process. During the first class we set goals for my learning and the classes are giving me the tools to reach that goal. Jérôme is very encouraging and has help me to get more comfortable with speaking French!
Review by ANNINA
Private lessons in Science (physics, chemistry and biology) - Secondary level, CESS, French, European & International Baccalaureates (Schaarbeek)
Sarah
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Sarah is a serious subject expert and talented conveyor of complex information - totally committed to getting the best possible student experience and transfer of knowledge in highly competent and state-of-the art manner either in person or in a virtual setting.
Review by DAVID
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