Tanya,
You could use a select by attributes query. It should look like the following:
NAME LIKE '%EP%'
This should give you all the schools that have EP in them. You might need to look over the selection to wheat out schools that have 'ep' in their name.
Once you have your clean list, you can just read the number off your attribute table 🙂
I would recommend to add a field called TYPE and use the field calculator to fill in EP, with this you can do this process a lot faster next time.
Hope this helps!
Tim