Chemistry

What this course covers

Chemistry has a reputation for being one of the harder sciences to self-teach, largely because so much of it builds on itself — atomic structure, bonding, reactions — and Khan Academy's free course is structured to walk through those layers in order rather than throwing you into the deep end.

Who it's for

High school and early college students working alongside a formal class, homeschoolers, or adult learners revisiting the subject for a career change into healthcare, lab work, or the sciences more broadly. Because it's free and self-paced, it also works well as pure supplementary review.

Video-based, sequential lessons make it easier to pause and re-watch a concept that didn't click the first time, which matters a lot in a subject where each new topic assumes you've genuinely absorbed the last one.

Why grab it: free, structured chemistry instruction from a trusted source is a genuinely useful supplement to formal study or a standalone refresher.