Look into numbering assignments/documents for each week

[alexander-bauer]

In the current model, assignments and documents may be reused in multiple weeks or across multiple semesters. However, they are un-ordered within weeks.

[alexander-bauer]

I think one way to accomplish this would be an intermediate table, where weeks refer to a numbered list of "items", where each item is just a reference to either an assignment or a document. The problem with this is ensuring that an item is never a reference to both or neither.