Index Cards
When it’s exam season, it doesn’t take long for students to finish a pack of index cards. At the dollar store, you’ll find a pack of a hundred cards for only 50 cents! If you prefer buying these kinds of things in bulk, you can also get 12 packs for $6.
Flashlight
While the dollar store doesn’t have the best quality flashlights, the mini ones can be good to have on hand. They’re good for power outs. Not to mention, they usually have keychains as well, which makes them easy to carry around.