Reactivity of halogens Student activity Play

Reactivity of the alkali metals and their electron configuration Animation Play

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

Removal of the spores of Clostridium botulinum from food Slideshow Play

s-Block elements Class activity Play

s-block elements Animation Play

s-Block elements Whiteboard presentation Play

Salmonella and food poisoning Student activity Play

Sample food chains Illustration Play

Sampling frame Student activity Play

Selecting blood for transfusion Animation Play

Sexual; kin and group selection Animation Play

Simple sugars Animation Play

Small nematode – big trouble Student activity Play

Solar energy Simulation Play

Sources of nutrients 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

Statements about assimilation of food Whiteboard exercise Play

Stratified sampling Student activity Play

Structural adaptations; mode of feeding and type of food Slideshow Play

Structural adaptations; mode of feeding and type of food Student activity Play

Structural isomerism: positional isomers and functional group isomers Student activity Play