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about everything in the class doubles as a teaching aid in addition to creating visual interest. He reached up and plucked a leaf off a Wandering Jew. Tearing the leaf in two, he said this particular plant shows students an excellent example of stoma or epidermal cells.
Taking a handful of purple coleus. Wood explained that the leaves, when boiled in water, act as an acid-base indicator. Waving a hand to indicate the 20-odd plants that hang in front of the windows, he said that all can be used to illustrate different methods of reproduction. “Besides,” he added, “they cut down on the light” by filling in for windo# shades.
“You never know when something will come in handy,” he said. “This way, you can grab what you want when you want it."
The bones hanging from the light fixtures are used during studies on anatomy, offering students a point of comparison with the human skeleton that stands in the back of the room. Woody fibers from the wasp nest, when examined under a microscope, show students how that insect gets its building materials.
Oxygen bubbles in an algae-filled aquarium graphically demonstrate the principles of photosynthesis while snails in a second algae-free aquarium serve as
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