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ERIC Number: EJ1177909
Record Type: Journal
Publication Date: 2018-Jan
Pages: 6
Abstractor: ERIC
ISSN: ISSN-0025-5769
Developing the Concept of a Radian
Wolbert, Roger S.; Moss, Erin R.
Mathematics Teacher, v111 n4 p272-277 Jan 2018
A common goal for mathematics teachers at any grade level is for "all" students--not just future mathematics teachers--to develop deep understanding of the mathematics they are learning and using. To that end, this lesson can be used in an upper-level high school mathematics course to introduce the concept of a radian in a way that encourages student reasoning and reflection. This discovery-based lesson is designed to provide students with opportunities for active engagement and productive struggle as they construct angles and formulate a rich conception of the radian.
National Council of Teachers of Mathematics. 1906 Association Drive, Reston, VA 20191. Tel: 800-235-7566; Tel: 703-620-9840; Fax: 703-476-2570; e-mail:; Web site:
Publication Type: Journal Articles; Guides - Classroom - Teacher
Education Level: High Schools
Audience: Teachers
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A