If I were to go back to school now, I would get an iPad Pro with a keyboard and stylus. You can get many textbooks directly to your iPad which can save a lot of money (sometimes even make up for the cost depending on the books you need). Also you can take notes directly on the iPad even using your handwriting using a stylus. You can get the software needed for word processing, spreadsheets, etc.
Keep in mind this is going to depend what you are going to school for. You may need a laptop as well for more computing power if you are taking programming or other computer-centric classes.
Hope this helps! Best wishes to you!