Male teacher gift ideas?Watch
Get one of those things that spell words using elements of the periodic table - my old chem teacher had a ring binder but I can't remember what the word was. Some of them are jokes (good for a funny teacher) and some of them are just regular chemistry style or teacher style words if that makes sense
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mendeleev t shirt
probably something like a tritium keychain would be a bit unusual and likely to actually be useful.