Atomic spectrum of hydrogen Student activity Play

Attraction and repulsion Student activity Play

Blot and symmetry Animation Play

Building a square from two squares Animation Play

Calculating the gradient of a line Animation Play

Calculating the radius, given the area Student activity Play

Cartesian equations describing a line in space Whiteboard exercise Play

Central and inscribed angles on the same arc Student activity Play

Centroid of a triangle Animation Play

Characteristics of cartilaginous fish Slideshow Play

Circle and line in a coordinate system Student activity Play

Circle and line in a coordinate system Simulation Play

Common points of the graphs of two functions Animation Play

Common tangents Student activity Play

Completing the proportion Whiteboard exercise Play

Completing the proportion Student activity Play

Congruency of triangles Whiteboard exercise Play

Congruency of triangles and other figures Student activity Play

Congruent triangles Animation Play

Constructing a line parallel to a given line Simulation Play

Constructing a perpendicular to a given line Simulation Play

Constructing a perpendicular to line at a point off the line Simulation Play

Constructing the image of a triangle in a line Animation Play

Construction of a line bisector Animation Play

Construction of a parallel line Animation Play