Developing the Concept of a Radian

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Whether you are teaching trigonometry for the first time or you have taught the subject for years, you may be wondering how to get your students more involved in understanding the meaning of a radian. How can you increase student engagement while making radian measures of angles meaningful in a way that provides a solid foundation for future mathematical learning?

Contributor Notes

Roger S. Wolbert,, is an assistant professor in the Mathematics and Computer Science Department at Edinboro University of Pennsylvania. He also works with graduate students in the University at Buffalo's mathematics education program.

Erin R. Moss,, is an associate professor of mathematics education at Millersville University of Pennsylvania. She teaches classes for prospective teachers of pre-K-grade12 and designs course work for graduate students in the MEd in Mathematics program.

(Corresponding author is Wolbert author is Moss
The Mathematics Teacher


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