If anyone else uses Jupitergrades.com, I am using their built-in quiz generator to provide extra reading for my level 1 students. I write a short short story using high frequency words once a week and follow it with 10 questions. The program allows kids to keep doing it until they get an A and it automatically reshuffles the questions they got wrong back into the quiz. I am offering extra credit to my students for completing it with a 100%.
If anyone already uses jupitergrades and wants to use my little extra credit readings for their classes, feel free to contact me. Really, this alone is not worth the subscription, and I am not even sure if we´ll be able to share within the program, but it is so low-hassle once the quizzes are set up that I would love to share them with someone.