Reflection: Exit Tickets Discovering the Formula for the Surface Area of A Cylinder - Section 3: Lesson End

There are many occasions when I allow my students to use notes during an exit ticket.  This is not one of those times.  I'd like to see how much the students actually retained/understood from the lesson.  I would rather see them struggle to recreate and apply what they have learned than just copy the work we did.  This applies to problems 1 and 2 especially.

All students (but 1) were able to draw the net of a cylinder from problem 1.  On problem 2, several students mixed up the formulas for area and circumference by labeling the length of the rectangle as PI * r ^ 2.  Those who were able to answer problem 2 were able to answer problem 3 correctly, except for the common error of finding the total surface area as opposed to the lateral surface area.

Discovering the Formula for the Surface Area of A Cylinder

Unit 6: Geometry
Lesson 20 of 37

Big Idea: A mysterious & hieroglyphic looking formula quickly becomes familiar and student friendly.

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30 minutes

Grant Harris

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