Sunglasses with a polariser Animation Play

System of coordinates Animation Play

Terms that depend on previous terms in a sequence Student activity Play

The nth term of a sequence Student activity Play

The nth term of a sequence Whiteboard exercise Play

The nth triangular number Animation Play

The application of the Doppler effect Animation Play

The correct position of the signs Whiteboard exercise Play

The distance between the centres of circles Student activity Play

The Doppler effect in the animal world Student activity Play

The electromotive series of metals Student activity Play

The electron configuration of an atom and its position in the periodic table Student activity Play

The electron configuration of an atom and its position in the periodic table Whiteboard exercise Play

The electron configuration of an element and its position in the periodic table Animation Play

The formation of an image by a spherical mirror Whiteboard exercise Play

The formation of an image by a spherical mirror Student activity Play

The formation of ionic compounds is exothermic Animation Play

The game of Change Places Animation Play

The inner structure of the atom Student activity Play

The position of a gene on the chromosome Whiteboard exercise Play

The position of a gene on the chromosome Student activity Play

The position of point B Whiteboard exercise Play

The position vector of the midpoint of the segment Animation Play

The relationship between atomic structure and the position of elements in periods Whiteboard exercise Play

The relationship between atomic structure and the position of elements in periods Student activity Play