I just noticed that there are a few different courses that I can't manage to find on the learn page. Can somebody explain this?
Codecademy used to let anyone who wanted to, create a course. If the course creator thought their course was high quality, they could submit it for Codecademy to review, and if Codecademy agreed that it was good, it would get put on the learn page.
Due to spammers using course creation for bad purposes though, Codecademy has had to take it down and now only allows certain people to help on a course. This has resulted in higher quality courses, and Codecademy is pushing a lot more effort into course development than they used to, so everyone wins now
If you find any spam courses, please let a moderator or staff member know!