I found a While back a webiste that will test kids on books then award points that can be used for simple prizes..nothing to dramatic, some tattoos or an ebook.

www.bookadventure.com

The kids have recently been taking tests everyday, or rather I have been asking them to. In general they do quite well, but the options are limited...well compared to the library anyway. We come home with a stack of 15 books and maybe two will be on there.

It works better if you go to the library with a list but our way the kid reads 4 books and takes a test on one..not such a bad thing.

Anyway it is a free way to check comprehension of a book I haven't read. Important as I read less and less of my sons books. Never thought I would say that....