I found the videos and explanations for Math SL very straightforward and easy-to-follow. If i didn't understand a topic or an aspect of a certain video, it was great to be able to rewind and listen to/watch it again. I learn by doing, so being able to take a quiz/test following a topic was a great way to practice and figure out if I knew the material.
A wonderful source for revision! – Anders J., Langkaer Gymnasium, Denmark