General help

Hello everyone. I'm using moodle 2.5.1.

I'm developing course site for students. The course consists of three parts:

    First, is the learning material, with video presentations.
    Then, They need to practice the material.
    Lastly, they go through the exam and get grades.

In my perspective, I think it's the best way to learn.

The first and last parts are easy to use with Moodle. However, the second part, which is building a "practice like" activity, is something that I couldn't accomplish. My idea is different from what the Quiz activity offers, that's why I've posted my question here.

So the thing is that I have hundreds of questions from the question bank, each question is built with the simplified calculation type. These type of questions have 20 or so variations. The questions from the question bank are defined to be from the easiest to hardest. When my students answer these questions, whenever they  didn't answer correctly, the next question will be the same question but with the variation from the simplified calculation type. Only when they get the answer correctly, they move to the more advanced one.

Have you ever tried doing something like this? Do you think it's possible?


Thank you very much,
Zack