More video explanations available:

If you missed class today (11/12), you should print the worksheet, and figure out as much as you can.  Then watch my quick explanation of it. 

The worksheet includes partitive and measurement division of types where the groups are very clear, and also of types where price or rate is part of the problem structure.

This video (which you have already seen) addresses grouping and price problems

Thie video addresses rate and multiplicative comparison problems.  We probably won't be doing multiplicative comparison problems this year. 

This web page describes how sets show up in price and rate problems.

This set of videos addresses only grouping types, but includes information on direct modeling.

This set of videos addresses price and rate problems