Math: Smart Board Activities
These sites have smart board activities for geometry, number and operation concepts, functions and algebra, fractions, and statistics. Explore the many different applets. Included is an eThemes Resource for Geometry for Junior and High School.
Grades
 6,
 7,
 8,
 9,
 10,
 11,
 12
Links

Interactive Mathematics Online
Find interactive math activities for Algebra, Geometry, Trig, and Chaos theory.

Math Activities for White Boards
Interactive activities include advanced data grapher, algebra tiles, congruence theorems, conic section explorer, dynamic paper, fractal tool, function matching, graph creator, limits, pan balance  expressions, random drawing tool  sampling distribution, two terrains, vector investigations and more.

MathDL OSSLETS collection
Use these open source, sharable mathlets for multiparameter animation, linear transformation and planar graphics.

Interactive Maths: Games and Activities
Use this site for interactive practice in number skills, shape and space skills, data and probability, measure skills, math investigations and links to other math pages. NOTE: This site includes ads.

Johnnie's Middle School Math
This site has interactive math activities for number sense, geometry, fractions, multiplication, fun, measurement, statistics, probability and links to intermediate whiteboard activities. NOTE: This site includes ads.

Activities Index
Scroll down for the "Geometry and Measurement Concepts." Many of these applets would be appropriate for middle school and up.

Browse the Gizmo Collection
Use the five minute free pass and choose from among these topics: "Lines and Angles," "Reasoning and Proof," "Right Triangle Trigonometry," and many more.

National Library of Virtual Manipulatives
Students can learn about the "Pythagorean Theorem," "Tangrams," "Space Blocks," "Turtle Geometry," and numerous other geometry topics.

eThemes Resource: Math: Geometry for Junior and High School
These sites have information on geometry for junior high and high school students. There are several interactive sites that allow the manipulation of geometric shapes. Also includes handson classroom activities and online quizzes. There are examples on how geometry is used in the real world such as geometric shapes in buildings and orienteering.