Use models (such as dynamic geometry software, patty paper and geo boards) to explore relationships among angles (complementary, supplementary, interior, exterior, vertical, and corresponding).0806.1.6

Links verified on 7/23/2014

1. Colored Chip Models - use manipulatives to model addition, subtraction, multiplication, and division with positive and negative integers [includes two practice problems]
2. Creating Congruent Triangles - materials needed: rulers and protractors [This expired page is brought to you by the Internet archive, the Wayback Machine.]
3. Electronic Examples - index of manipulatives from NCTM
4. GeoBoard - this two-part example describes activities that use interactive geoboards or
5. Integer Bars - learning fractions and more with on-line manipulatives or
6. Math Playground - a small but growing collection of manipulatives for teaching and learning or
7. Measuring Angles - use a virtual protractor
8. Measuring Angles - Practice lining up and reading a protractor while you measure a set of angles in a fun learning activity or
9. National Library of Virtual Manipulatives Home - select topic and grade level to find appropriate manipulatives or
10. Pattern Blocks Program - use tools to solve a variety of problems or
11. Tangrams - interactive geometry site or
12. Virtual Protractor - ten online activities investigating angles or
13. Wolfram Demonstrations Project - a free resource of interactive visualizations from elementary education to the frontiers of research