1. Math classes: algebra, calculus, analytical geometry, complex variable and so on. All levels: basic, intermediate and advanced, 2. Physics: mechanics, electricity and electromagnetism, optics, fluidics and so on. All levels: basic, intermediate and advanced. 3. Analog electronics, RF engineering and matlab programming. All levels: basic, intermediate and advanced. 4. Languages: English and Spanish. All levels (from A1 to C2). My goal is to make the students to highly perform in their studies or academic career. The lessons mix theoretical concepts with practical ones. Especial emphasis is made on the concepts that are more difficult to understand for the students. Extra exercises taken from the literature or from my personal notes are practiced during the lessons in order the student to fix all the explained theoretical concepts. The key point for me is that the student is enjoying the time while is learning. Thanks to practical examples that I put during the lessons, taken from my professional experience in the bioengineering field, the students fix better in their brains the technical concepts.