How I Use It
I use it in a few ways: I use the homework quizzes (which you must have the actual app to do) in my classroom as a way to quickly check understanding on a near-daily basis and as a way to differentiate between students with different academic needs. I use the regular, whole-class quizzes as an end-of-week review quiz for the students as a fun way to make sure they've understood content (usually reading content) and to see what things they get wrong so I know what to review the next week. It works great as quick checks, but it doesn't work as a deep-level understanding check. It's a multiple choice, closed-set quiz. Great for engaging students and for activities that practice recall-level content, but it definitely shouldn't be the only means of assessment you use.
I really like this game. My students (1st and 2nd grade) can do it independently with just a few initial walkthroughs. I love how I can differentiate activities for my students using the homework quizzes. The biggest shortcoming is that it's only a multiple-choice quiz. It isn't trying to be anything more than that, and it's certainly one of the best at what it does, but don't try to use it for your only assessment. Also, it only really works if you create your own quizzes to make sure it's EXACTLY what you want, or by thoroughly checking the quizzes you search for. I've found plenty of errors in quizzes or quizzes that are all about exactly what you want, but I overlooked the "Who's the best teacher?" question someone threw in "for fun" until my kids confusedly ask me who those people are mid-game. Like all teacher tools, if you put effort into it and use it as a TOOL rather than something to quickly plug and play, it can really be quality.