Constructing sequences Whiteboard exercise Play

Convergent series Animation Play

Converting the percentage to a fraction Whiteboard exercise Play

Cross-multiplication Student activity Play

Decreasing sequence Whiteboard exercise Play

Decreasing sequences Student activity Play

Departures from Mendel's first law: co-dominance Student activity Play

Departures from Mendel's first law: co-dominance Whiteboard exercise Play

Diagram of a series Animation Play

Diagrams of geometric sequences and series Student activity Play

Difference of squares Student activity Play

Diffusion (Fick's first law) Student activity Play

Distance between points in 3-dimensional space Whiteboard exercise Play

Distance formula in 3-dimensional space Student activity Play

Dmitri Mendeleev and the first periodic table Animation Play

Drawing dots Student activity Play

Drawing dots Whiteboard exercise Play

Effect of concentration on the reaction rate. Graphical methods Class activity Play

Effect of concentration on the reaction rate. Graphical methods Whiteboard presentation Play

Einstein's first postulate Whiteboard exercise Play

Einstein's postulates Student activity Play

Electron configuration of few first elements Animation Play

Embryonic stage – the first 8 weeks of embryo development Student activity Play

Embryonic stage – the first 8 weeks of embryo development Whiteboard exercise Play

Equilibrium of forces – Newton's First Law of Motion Whiteboard exercise Play