To print out the Student Copy only, click here . If your school does not have sodium hydroxide, then it can be obtained from Drano or Red Devil Lye. Also be careful with sodium hydroxide pellets. They will absorb water from the air to create a concentrated drop that will burn through most fabrics. Solutions can be prepared directly and since this is a precipitate reaction, the concentrations are qualitative and approximate.
Ammonium hydroxide is nothing more than household ammonia.
Use it straight out of the bottle from the grocery store. The only chemical that may be difficult for you to find is the zinc nitrate. Probably the easiest thing to do would be to borrow some from the high school that your school feeds into. You will need 20 to 30 g of it. Again the concentrations are not critical.