This is made so kids can learn on their own. All they do is follow the videos on the page and complete the challenges. Once they have completed all the challenges, they can move to the next level. If you want to do assessment, you can have them send you pictures or videos of them completing the last task of every level.
It starts with very simple challenges, perfect for the least-skilled and progresses to competent catching skills. Because most players won't need to do all of the early challenges, there is a shortcut to move on.
Here are the videos for level 1. The challenge is to catch 20 times and the shortcut is to catch 5 in a row. Tap the right arrow to move to the next challenge. To see more levels, start at Level 1, then click on the Level Up icon at the bottom of the screen.