Hands-On Circumference Activity

This year, I am the algebra instructor inwards my school.  I instruct Algebra 1, Algebra 2, as well as College Algebra.  The solely math flat I don't instruct is geometry.  Our other instructor teaches all of the geometry classes as well as 2 hours of Algebra 1.  Initially, I was glad to non survive instruction geometry since I haven't had much sense alongside it other than taking geometry inwards high school.  However, every bit the twelvemonth progresses as well as I notice myself helping students alongside their geometry homework, I'm realizing only how fun of a flat it would survive to teach.  I await at their homework as well as showtime imagining all of the possibilities for foldables as well as hands-on activities.   

Last weekend, I spent some fourth dimension looking through all the pictures I had taken during the by year.  I ran across some pictures I had taken to lay inwards my online portfolio that I created during my undertaking search.  This was ane of those pictures. 

Hands-On Circumference Activity

For my methods of instruction class, nosotros had to write a specified publish of lesson plans.  Each lesson excogitation had to follow a strict format as well as include examples of what the completed activities or assignments should await like.  One of the lesson plans I wrote focused on applying the formulas for expanse as well as circumference of a circle. 

The stance behind the lesson was that students would purpose materials to verify the formula for circumference of a circle.  I would get together circular objects for my students to purpose to draw circles.  After tracing around a circle, they would guess the middle of each circle as well as depict the radius.  Using a ruler, students would mensurate the radius as well as purpose the formula to notice circumference.

After arriving at an answer, students would purpose a ruler as well as pair of scissors to cutting off a slice of yarn the length of their circumference.  They would thus lay the yarn around the circumference of the circle to verify their answer.  If the slice of yarn was likewise long or short, the students would demand to verify their measurements as well as notice their mistake.

I mean value this would survive a groovy agency to present students that the circumference formula is to a greater extent than than only a jumble of letters.  I haven't used this inwards my ain classroom, though.   

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