Reactivity of halogens Student activity Play

Reactivity of the alkali metals and their electron configuration Animation Play

Recommended daily protein intake according to sex and age Illustration Play

Relationship between maternal age and risk of Down's syndrome Illustration Play

Relationship between the group number and the number of valence electrons Animation Play

Risk factors for cardiovascular disease Whiteboard exercise Play

Risk factors for cardiovascular diseases Student activity Play

s-Block elements Whiteboard presentation Play

s-Block elements Class activity Play

s-block elements Animation Play

Sampling frame Student activity Play

Sampling methods Student activity Play

Sampling methods Whiteboard exercise Play

Sedimentary rocks. Part II Whiteboard presentation Play

Sedimentary rocks. Part II Class activity Play

Selecting blood for transfusion Animation Play

Sexual; kin and group selection Animation Play

Simple sugars Animation Play

Solving practical problem Student activity Play

Spectra of compounds with a carbonyl group Whiteboard exercise Play

Spectra of compounds with a carbonyl group Student activity Play

Standard reduction potentials Student activity Play

Standard reduction potentials Chart Play

Stem-and-leaf diagram for the ages of employees Student activity Play

Stem-and-leaf diagram for the ages of employees Whiteboard exercise Play