Some Tips

Whenever opening a data set and understanding it’s layout. I like sorting the data and then browsing it. Let’s try it here in different ways:

sort courseid instrid year
br courseid instrid  year

I also like seeing other variables to understand better what each row is telling us, but without sorting them only the first ones.

br courseid instrid  year required eval apct

Then I’d like to try changing things up to see if that help my understanding. I use the order command to change the way variables are displayed on the browse. I’ll mix up the sorting here

order  instrid year courseid 
sort instrid courseid year 
br instrid  courseid  year required eval apct