The shape of the radiation spectrum Animation Play

The shortest route to a line Whiteboard exercise Play

The shortest route to a line Student activity Play

The solution set of a system of inequalities Student activity Play

The solution set of inequality Whiteboard exercise Play

The solution set of the linear equations Whiteboard exercise Play

The spectra of galaxies Animation Play

The spectral lines in the atomic spectrum of hydrogen Animation Play

The spectrum for a greater number of slits Whiteboard exercise Play

The spectrum of white light Animation Play

The standard and the general form of the equation of a straight line Animation Play

The standard equation of the straight line Animation Play

The standard form of the equation of a straight line Whiteboard exercise Play

The standard form of the equation of a straight line Student activity Play

The steep road Animation Play

The structure of atomic nucleus Whiteboard presentation Play

The structure of atomic nucleus Class activity Play

The sum of the angles in a polygon Student activity Play

The symmetry of isosceles triangles Animation Play

The symmetry of triangles Whiteboard exercise Play

The tangent Whiteboard presentation Play

The tangent Class activity Play

The tangent intersecting a curve Animation Play

The tangent theorem – solving problems Whiteboard exercise Play

The tangents to the circle that are parallel to the line Animation Play