I am building a student evaluation system. The teachers login and I have a page with a form for each class. the teacher selects the student and fills out the evaluation and submits it to a collection for that class. parents can have multiple students in multiple classes. I currently have a collection for each class evaluation form. there are 14 classes. is there a way to filter all 14 collections in a single table? or is my approach incorrect? do I need to query each collection and combine and filter the results? how would I do this?