Websites

Websites

[|NCTM Illuminations] This activity is an interactive investigation that has students discovering the properties of parallelograms. The investigation includes a worksheet that has leading questions that walk the students down a path leading them to discover several important properties of parallelograms. Like all NCTM illuminations activities the activity ties to national math standards and can be linked to previous and post investigations. The investigation tool is a web based Java applet that allows to students to modify the diagonals of a parallelogram to different values in the hopes that they will notice a particular pattern.
 * Perplexing Parallelograms
 * Target: High school geometry students (9th - 10th grade)**

Learner.org Interactives This activity is a complete package of course material revolving around the use of solids, surface area, and volume. The interactive lesson provides all the material of an entire unit of geometry in a simple, easy to read, and convenient package. The idea of the activity is to allow students to freely explore the properties of 3D solids. Solids can be somewhat overwhelming to a a geometry student, because the entire course previous to the solids unit usually discusses 2D objects only. Also, many students are looking for formulaic approaches to geometry problems, where many 3D figures do not have formulas to work with. The activity enhances students ability to think abstractly and provides a hands on approach to a fundamental unit of geometry.
 * [|Discovery of Solids]
 * Target: High school geometry students (9th - 10th grade)**

Regents Prep This activity is a walk through for proving triangles congruent. Proofs are often the most difficult and confusing component of a geometry course. This activity allows students to see the flow and rational to the proof and work through it themselves and then reveal the step by step process when they are either complete with the problem or get stuck.
 * Proving Triangles Congruent
 * Target: High school geometry students (9th - 10th grade)**