I did a summer of khan academy over a decade ago.

I was switching from liberal arts to NLP and wanted to train my math muscle. I went with their “world of Math” which was a feature to go over all math problems “in order”. When stuck you could view the associated video.

I don’t think they have that feature anymore.

As khan Academy goes from preschool through high school, you start out by counting pictures of elephants and other exercises meant for young children to get comfortable with numbers, which was definitely too early a place to start.

I thought it was fun to see how such exercises looked and I didn’t really now how far I wanted to skip so I just powered through.

I think it was really good with the above caveat. My other two cents are: going from way too easy problems to problems you actually have to work on is jarring in terms of pacing. All in all I enjoyed it.

It’s love to know how it compares to MathAcademy. I think Khan Academy is of really high quality and to go from free to $50/month requires a lot of added value.