The Milky Way Student activity Play

The nature of seismic waves Student activity Play

The nature of seismic waves Chart Play

The nature of seismic waves Whiteboard exercise Play

The number line Whiteboard exercise Play

The origin and registration of seismic waves Whiteboard exercise Play

The origin and registration of seismic waves Student activity Play

The origins of seismic waves Slideshow Play

The perpendicular bisector Student activity Play

The perpendicular bisector Simulation Play

The perpendicular bisector of a line segment Animation Play

The perpendicular bisector of a line segment – a reminder Student activity Play

The position of point B Whiteboard exercise Play

The position vector of the midpoint of the segment Animation Play

The ratio of two segments Whiteboard exercise Play

The rhombus and the circle Student activity Play

The rhombus and the circle Whiteboard exercise Play

The second tangent theorem – equality in length Student activity Play

The second tangent theorem – equality in length Whiteboard exercise Play

The segments in the circle Whiteboard exercise Play

The shortest roads Whiteboard exercise Play

The solution set of inequality Whiteboard exercise Play

The space diagonals of a cube Student activity Play

The structure of a spherical mirror Animation Play

The structure of a spherical mirror Animation Play