By Julie Anderson, World-Herald
Before he began “flipping” his classroom several years ago, Contreras would have begun class by delivering a classroom lecture, then launching students on a lab activity, and, finally, sending them home with homework. Instead, the students this day quickly broke into small groups and rotated among microscopes trained on samples of different tissues, from bone to cartilage. Students consulted with one another about what they were viewing. Contreras worked the room. He pointed out that fat cells look clear because they resist stains used to make structures visible and praised a student who compared loose connective tissue, the hardest to identify, with a fishnet.
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