Often in biology you need to show the students something and it's small and very difficult for them to see from their seats. One such situation is when you need to show them how to make a wet mount slide or how to use a dropper and a paper towel to change the water under the coverslip.       If you know me, you'll know that I love hardware stores. I love the way you yourself can use a little  elbow grease and fix something yourself. I even love just wandering the store for new ideas. Well, this is one of those ideas. I was at the hardware store and I had an ah-ha moment. I had the clerk cut me two pieces of plexi-glass....one approximately 9 inches by 20 inches (to make a large slide) and the other approximately 6 inches x 6 inches (to make the coverslip).  plexi-glass slide, coverslip and dropper Here's a baster for sale at Kohl's            I used a piece of sandpaper to smooth down the edges...