Watch Module 1 thoroughly to get a clear idea about keyword research. (VERY IMPORTANT)
If you watch it, you will understand what all keywords to target collectively, and what keywords are to be separated.
In a nutshell, if you find similar sites ranking for a set of keywords, make them into a group and make a page targeting those keywords.
If you find different sites/pages ranking for the keyword, make a different page for those set of keywords.