Talk:World of Math - number of skills/@comment-25143095-20140919012559

What I find kind of surprising is that KA has Mastery Challenges and Challenge Patches for

- Early Math

- Arithmetic

- Pre-algebra

but not Basic Geometry, even though they created a category or Mission and playlist for it. Maybe it's coming. Wonder what exercises will be removed and added to the Geometry mission if they do.

https://www.khanacademy.org/math/basic-geo