The concept of pH Student activity Play

The corresponding power of 10 Animation Play

The decimal as a negative exponent Whiteboard exercise Play

The decimal representation and the negative exponent Whiteboard exercise Play

The defects of lenses Student activity Play

The defects of lenses Whiteboard exercise Play

The derivative of a natural power of x Student activity Play

The derivative of a natural power of x Student activity Play

The derivative of a natural power of  x Whiteboard exercise Play

The derivative of a natural power of  x Animation Play

The derivative of a natural power of  x Whiteboard exercise Play

The derivative of an arbitrary rational power of x Student activity Play

The derivative of an arbitrary rational power of  x Whiteboard exercise Play

The derivative of an integer power of x Student activity Play

The derivative of an integer power of  x Animation Play

The derivative of the function on the graph Student activity Play

The discovery of the electron and Thomson's model of the atom Student activity Play

The efficiency of a loudspeaker Animation Play

The efficiency of a power station Student activity Play

The efficiency of a power station Simulation Play

The efficiency of a transformer Whiteboard exercise Play

The efficiency of a transformer Student activity Play

The electron as the earliest discovered component of the atom Animation Play

The electron microscope Whiteboard exercise Play

The electron microscope Student activity Play