This model helps to visually represent finding a part of a part. It is often introduced with story problems like this: Stephen eats 34 of a brownie pan that has only 25 left. What fraction of the whole brownie pan does Stephen eat?
All modal verbs are auxiliary verbs, which means they can only be used with a main verb. Modal verbs cannot be a main verb. They are used to express ideas such as possibility, prediction, speculation, deduction and necessity.
20 middle school routines and procedures: This list would be good to keep when planning class procedures. I don't think you could do every single one of these, but it would be good to go through and see the ones that will work for the class environment.