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Hello! I'm a student teacher and I need to plan a demonstration to do in my college course with magnets. Can anyone suggest somewhere I can find some good and cheap magnets that my peers can use during the exploration of my demonstration? I just need some marble ones, as well as a horseshoe magnet...?

Another good place to check is American Science and Surplus (again, if you have time to order some). They have a lot of this type of supply, sometimes a bit random, but much cheaper than buying from other places. www.sciplus.com Good luck!