My Take
I honestly think this is one of the best free learning apps. The interface is very clean (in comparison to some others which I find overwhelming and too busy) and easy to use. The lessons are very interactive and to the point which is great for kids - especially the younger ones. I wish they would separate Social Studies and Science into individual grades instead of making them K-2 and 3-5. I find it is a bit too easy to the older grades. Otherwise, no complaints. Kids are also encouraged to keep trying and have unlimited chances to complete levels and exercises. I think this is encouraging for them and helps motivate them to keep trying. There seems to be feedback where it is needed, otherwise they just learn by doing. Further, they create very diverse content and all my students can find themselves in the content. That's also not to be undervalued in my opinion. Overall fantastic app.
How I Use It
This is great for independent study time, to use as a supplement to lesson plans, and for assigning homework. The kids seem to really enjoy it and are motivated to keep coming back and learn more to earn their coins. They like the games, but the LOVE their avatars. I also tell parents about it who are looking for extra work. Because the kids can have it on their own devices, it makes it really easy to take home.