I have started reading the code for moodle, for a project I am doing for school. The specific module I am looking at is the quiz module. While given enough time I will be able to understand and modify it, I was wondering if anyone knew of any resources I could read that would help me to understand it faster and help me with any pitfalls to avoid.
I have already read the developer's manual and coding style guide. In addition, I understand that every module has its own lib.php file along with the other 3 mainly used libraries. But as I said, if there are any other references I may have missed, please let me know.