## Reflection: Developing a Conceptual Understanding Define Radian Measure - Section 3: Reinforcing the Concept of Radian

I realized that the key moment in this lesson, the one I really need to make sure that students get, is when they're asked to explain how they'd find the radian measure using a string, ruler and calculator. If they get this, then conceptually they really get the idea of what a radian is. From there everything will be downhill. Because this part of the lesson is a "talk with your partner" activity, I have to make sure to get around and hear the conversations and make sure that students are actually having the conversations. I have to do things like ask one partner to repeat what they have heard the other say and explain why it does or doesn't make sense. I also have to be sure to have a really good share out so that the whole class hears the best ideas and even the misconceptions so that those can get addressed and clarified.

I'm considering making this more of a manipulative-based activity rather than just envision and discuss, I just haven't figured out how best to design the materials so that students get fairly accurate estimates.

Key Moment in the Lesson
Developing a Conceptual Understanding: Key Moment in the Lesson

Unit 12: Unit Circle Trigonmetry
Lesson 2 of 5

## Objective: SWBAT explain the meaning of radian measure.

Print Lesson
Standards:
Subject(s):
65 minutes

### Anthony Carruthers

##### Similar Lessons

###### Riding a Ferris Wheel - Day 2 of 2
12th Grade Math » Trigonometric Functions
Big Idea: Make the transition from the Ferris wheel problem to the unit circle.
Favorites(3)
Resources(10)
Troy, MI
Environment: Suburban

###### Arc Length and Sector Area
12th Grade Math » Trigonometry: Circles
Big Idea: Students find their friend similarity lurking in a table of repeated calculations. A firm concept of radian measure follows close behind.
Favorites(11)
Resources(14)
Worcester, MA
Environment: Urban

###### Is John Guilty
12th Grade Math » Trigonometry as a Real-Valued Functions
Big Idea: By analyzing data from an accident students will determine whether a driver was speeding when he wrecked his vehicle.
Favorites(0)
Resources(19)
Independence, MO
Environment: Suburban