See how to solve each math topic, from 1st of ESO to 2nd of Bachillerato, and then practice that same topic with instant AI grading.
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Each series explains a topic on video and guides you to practice it with hundreds of instantly corrected exercises.
Addition, subtraction, multiplication, and division of fractions without getting confused by denominators.
Practice this topicThe method to solve for x that works for everything, along with common mistakes.
Practice this topicThe quadratic formula well explained and when it yields one, two, or no solutions.
Practice this topicSubstitution, comparison, and elimination: which one to use in each case.
Practice this topicDirect, inverse, and percentage problems that always show up on the exam.
Practice this topicCalculate the hypotenuse and legs, and solve problems with diagrams.
Practice this topicDifferentiation rules, the chain rule, and derivatives for Selectividad.
Practice this topicDirect, by parts, and by substitution, with EvAU examples.
Practice this topicUnderstand the topic with a step-by-step solved exercise.
Solve exercises of the same type on Refuerzo.ai.
The AI corrects you instantly and explains where you made a mistake.
Yes. All the videos on the channel are free. They help you understand each topic; then you practice with hundreds of exercises and instant correction on Refuerzo.ai.
From 1st of ESO to 2nd of Bachillerato, organized by topic according to the curriculum (LOMLOE). Each series takes you to a page where you can practice that topic.
Below each video, you have the link to the topic in Refuerzo.ai. There, you can solve exercises of the same type and the AI corrects you step-by-step instantly.
We publish new videos every week, following the school calendar: in May and June, final exams and EvAU review; in September, back-to-school review.
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