Budding hydra Illustration Play

Building a demonstration from a proof Student activity Play

Building a demonstration from a proof Whiteboard exercise Play

Building a proof Student activity Play

Building a proof Whiteboard exercise Play

Building a proof from a demonstration Student activity Play

Building a proof from a demonstration Whiteboard exercise Play

Building a proof from deductions Student activity Play

Building a proof from deductions Whiteboard exercise Play

Building a regular polygon Whiteboard exercise Play

Building a square from two squares Animation Play

Building polypeptides Simulation Play

Building the sequence Whiteboard exercise Play

Building the simplest voltaic cell Animation Play

Bumblebees and clover Slideshow Play

Buoyant force Class activity Play

Buoyant force Student activity Play

Buoyant force Whiteboard presentation Play

Buoyant force Animation Play

Buoyant force Whiteboard exercise Play

Burette Slideshow Play

Burning of methane Whiteboard exercise Play

Burning phosphorus and preparation of phosphoric(V) acid Animation Play

Burning sodium in chlorine Animation Play

Burns Animation Play

Buses Animation Play

Butene Illustration Play

Butterflies Student activity Play

Butterflies Whiteboard exercise Play

Buying stamps Whiteboard exercise Play