This lesson from Illuminations teaches students the features of sine and cosine graphs. Students use uncooked spaghetti to demonstrate the properties of the unit circle, which they will then represent with graphs. It is...

This geometry lesson from Illuminations presents a real-world problem for students to solve with mathematical functions. The material involves constructing the circumcenter and incenter of a triangle. Learners will gain...

This geometry lesson from Illuminations involves using sidewalk chalk and rope to illustrate the locus definitions of ellipses and parabolas. Students will define conic sections, apply locus definitions and collaborate...

This geometry lesson from Illuminations introduces a hands-on learning activity for students in grades 9-12. The class will use pasta to create models of triangles. They will examine the relationship between sides and...

This geometry lesson from Illuminations aids students in the transition from using two-column proofs to paragraph-style proofs. The material helps students to understand proofs as chains of statements, and learn to think...