This course is intended for preparatory year university students and all majors that rely on the study of differential and integral calculus (Calculus 1 & 2), such as: engineering in all its branches, natural sciences, computer science, economics, and management, in addition to any field that requires a strong foundation in mathematics. In this course, we will go through a step-by-step explanation of the concepts of differentiation and integration, starting with limits, derivatives, and their rules, then moving on to practical applications of differentiation, such as maximum rates of change and solving physical and engineering problems. Finally, we will discuss definite and indefinite integration and its various methods of calculation, with practical applications for areas, volumes, and solving equations. The lessons are designed in a simple and streamlined style that helps students understand complex concepts easily, with a focus on practical training through solving exercises and questions similar to those found on university exams. Detailed explanations of common mistakes and practical tips are also provided for confidently passing Calculus and achieving outstanding results. This course is not limited to simply solving problems, but rather aims to build a solid mathematical foundation that will enable the student to pursue his other university courses more easily.