posted by: abeebe
Fish production was at an all time low this week. When the first class observed their tanks, there were NO embryos, Ms. Oughdiri and I started looking at the next bin of tanks (she has 6 classes of eigth graders), and again found NONE!!
Panic slowly crept in while we began looking through the third period tanks-pheeeeeww (wipe brow)- we found one with eggs! I was afraid we were going to be twiddling our thumbs, talking about what we were SUPPOSED to be looking at….
There were lots of embryos-enough to supply the whole 1st period with about 10-20 embryos per petri dish, and still had about 50 left over for the original “owners” of that tank. The embryos had JUST been fertilized, so we saw them at the one, and two cell stage-very rare for me, are really cool to see. The cells divide approximately every 15 minutes, so the students were hoping to observe mitosis happen while they watched, but unfortunately the end of the class came too soon…
I am adding to my blog for this week, because I wanted to share what happened on Friday. One of the 8th grade classes was observing an embryo on the projection microscope while it flipped around in its chorion (shell), fighting to get out. I have seen that before, but never has a class stuck with this process, not wanting to take the view off of that one embryo. At times they were simultaneously cheering this little fish on to freedom. I and Ms. Oughdiri whispered to one another that this critter BETTER hatch out, with so many students depending on it. It took about 10 minutes, but it happened-WOW-the whole class went crazy with cheers as if they were cheering on their favorite sports team. What a great time! Their patience and perseverance paid off!!