Arithmetic mean – the 'true' value of the data Whiteboard exercise Play

Arrangements Student activity Play

Assigning electrons to atomic orbitals Student activity Play

Astronomical numbers Animation Play

Atomic mass of an element Student activity Play

Atomic mass of an element Animation Play

Atomic number Student activity Play

Atomic number Animation Play

Atomic number Whiteboard exercise Play

Atomic number and mass number Student activity Play

Atomic numbers and mass numbers of the elements Animation Play

Average Animation Play

Average and instantaneous speed Student activity Play

Average and instantaneous speed Whiteboard exercise Play

Average concentration of CO in the atmosphere Slideshow Play

Average monthly temperatures Whiteboard exercise Play

Average of the Earth's density Animation Play

Average price Whiteboard exercise Play

Average result Whiteboard exercise Play

Average speed Animation Play

Average speed Animation Play

Average speed Student activity Play

Average speed Animation Play

Average speed Student activity Play

Average speed Whiteboard exercise Play