Last night, on the AP-Bio listserv a teacher asked about trouble with sinking leaf disks for the Floating Leaf Disk lab. Her class had difficulty getting the spinach leaf disks to sink. I offered some possible solutions and I also promised to post a video of the procedure in case the students were missing something in the written protocol. Here’s the quick video that I made this morning.
Google video seems to be down this morning (Sept. 30). If this continues I’ll upload the video to a different service–stay tuned.