One of my students’ favorite labs was the protozoans under a microscope lab. I had gone to a nearby pond and collected a bunch of water samples. I taught the students how to use depression slides and pipettes to put a drop of pond water onto the depression slides and then put a cover slip over the slide. We saw many fascinating critters. My favorite protozoan was the pretty blue Stentor, a funnel-shaped proto with the larger end ringed with cilia. Occasionally we got to see one species of proto devour another species, which was very interesting.
Biology class was my favorite. I remember dissecting night crawlers and then frogs. The worm dissection class went fairly well, but a couple kids tossed their lunch during the frog class. One of the frogs wasn’t quite dead, and it’s heart was still beating, a girl freaked out knowing she killed it. It was a disaster from that point on. But a couple of us, including myself thought it was hysterical, in spite of the stench. 60 years ago, and I can remember it like it was yesterday.