It depends what kind of vacation your friend wants. Last year on our first trip to Aruba we stayed part of our visit in the low rise area and part in the high rise. For our style, the high rise was better. We don't rent a car, we prefer to walk. We like to have a lot of options in walking distance so the high rise works better for that. We also like the cheesy touristy places like Senor Frogs mixed in with the beach bars like Moomba.
Also you mentioned she is a teacher, so if budget is a concern, Holiday Inn is not a bad choice if you keep in mind that you are going to get what you pay for. I would suggest reading the reviews on Trip Advisor - they are mixed, but most of the points are right on, good and bad. The Occidental looks so nice and I would love to stay there, but for our budget Holiday Inn works better. They have an all-inclusive option but it doesn't not include top shelf liquors, and only Belashi beer. This yer we are skipping the All-inclusive option since we were so comfortable going off the resort.