Depending on the class, I may or may not allow them a word bank. This is done in complete silence with no working together. Students have 1 minute at each station to identify the structure and write it on their answer sheet. This is where pigs are set up at stations with numbered or colored tags in the structures. The biggest part of their grade comes from the LAB PRACTICAL. Reduce pts if there are blanks or incorrect answers. If its completed and looks mostly right, then they get the full 5 pts. Generally I use a quick and easy method to grade it. But as worksheets go, you do want the students to work out the answers together and ask for help when needed. I take a grade on the completion of this lab guide. I have switched to nitrile gloves because it provides more of a barrier from harsh chemicals, but they are slightly more expensive.ĥ. Many chemicals will seep through the latex. Students should always wash hands even if they wore gloves. Latex gloves are optional, though generally preferred. Safety: Goggles are required for all dissections. Generally, 1 pig for two students is a good match, but you could get away with 3-4 students per pig.Ĥ. If they are not injected, the circulartory system is very difficult to view. Pigs will need to be ordered from a biological supply company. Have your students completed the frog dissection? The pig is more advanced, students should have a basic understanding of dissection protocols.ģ. This is not a good dissection for classrooms that do not have sinks.Ģ. Do you have space with a sink? Pigs are a lot more involved than frogs and the preservatives will need to be drained and pigs rinsed.
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