Create questions of each type, but particularly numerical (with units), shortanswer, multichoice, calculated*, multianswer. With shortanswer/numerical/calculated, make sure you add multiple answers with different feedback. Check that queries like select * from {question_answers} , select * from {question_numerical_units} , select * from {question_match_sub} acutally return the records in an arbitrary order. With a new/small/MySQL DB, they often come out in id order, and you will not see the problem. Backup your questions and restore them. (e.g. backup and restore course to a new course.) Without this patch, you will find that the answers/choices/subquestoins have been restored in a random order. With this patch, it works.