Preposition remix – Preposition Remix Review

I really like this app but..... there is no way to present the prepositions randomly. I would like to mix the concepts. Of course the child is going to do better if the same concept is presented consecutively. He can predict what is next. Otherwise, this is a really useful app. Thx for creating random feature. ANOTHER PROBLEM: "on top of" indicates it's incorrect although the correct target is chosen. That's very disappointing to my students. Please fix it because I like this app. Sincerely.
Review by Quickie from Vickie on Preposition Remix.