Intro to Microscopes

 We use several microscopes.  Our first lab is with currency.  We travel and often have leftover currency.  We use digital and conventional microscopes to look at the notes.  The kids switch microscopes.  The point is to learn how to focus with a microscope.  We did go over the parts of the microscope and a few rules, such as focus on the lowest objective.  The anti-counterfeit threads, words and colors vary enormously.