Reflection: Routines and Procedures Radian Measure Day 1 of 2 - Section 1: Bell Work


As students were working in my first class, I found one group using the string in a way I did not expect.  The picture shows that the students did not use the string as a radius but tried to make a circle with the string. They eyed the  figure until it was close to a circle.  When I told them they needed to draw the circle on the paper they tried to trace as close to the string circle as possible. This group's circle was not as accurate, which will probably make the ratios different then the other groups.

After seeing how the students were using their tools. I made sure to questions students closer during the bell work to make sure the students understand how to use the materials to be the most accurate.

  Routines and Procedures: Mistakes happen, even with careful preparation
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Radian Measure Day 1 of 2

Unit 7: Trigonometry as a Real-Valued Functions
Lesson 2 of 13

Objective: SWBAT find the radian measure of an angle.

Big Idea: By finding the ratio of arc length to radius, students will understand that radian measure is a real number.

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3 teachers like this lesson
Math, Measurement, radian measure, circles, ratios
  55 minutes
good example
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