Activity 1: constructing a diagram of mitosis. 8-10 minutes (This activity should be saved to be used for assessment at a later time.)
Materials Needed: plain, unlined construction paper for each student, pencils
1. Direct students to fold paper in half, (you may decided whether horizontal or vertically) which creates two columns. At the top of the page, direct the students to print MITOSIS.
2. Direct students in the first column to print "Before" and in the second column print "After"
3. Direct the students to draw a diagram of a cell undergoing mitosis. Explain briefly that a diagram is a picture with labels and that mitosis is the process of a cell undergoing replication and division. In the columns "before" the students should draw and label what they think a cell looks like in the four basic stages when it is undergoing mitosis.
4. Make sure the students have put their names on their diagrams. Collect papers when class is finished. You may want to review with the students what they think they know and what they have included in their diagrams before you collect the diagrams. Save the diagrams for a later activity to complete the "after column."
Activity 2: Mitosis Onion Lab 10-15 minutes (The teacher should have the students grouped and structured for using the microscope stations. review with students the proper procedures for use of microscopes.)
Materials Needed: paper and colored pencils for recording observations by students, prepared onion mitosis slides, microscopes, lab sheet
View of a Prepared slide of onion mitosis
1. Tell the students that they will be observing onion cells undergoing mitosis. Direct the students to look for different stages/steps of the cell. Remind the students that mitosis is a process and follows specific stages in order to complete cell division. Remind the students that they will have to move the slide around on the stage to try to identify the different stages of mitosis.
2. Direct the students to go to the microscope stations and begin the activity. Direct the students to record what they see. Direct the students to look for four different stages of the onion cell.
3. When the students have completed the observations, go over their observations. Students may share their observations.
4. Collect observation sheets and assess student progress.
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