Introduce ionic and covalent bonding using the animated PowerPoint. Get students to explain what is happening at each stage. Worksheet challenges students to recall electron arrangements for atoms and identify products of reactions. Finally students identify the type of bond formed. As an extension, students could give their own examples. This lesson should follow an introduction to atomic structure.

Perform the pH practical activity to test the suggested chemicals and / or display slide 3 for those that you cannot test. Print slide 2 for students who must colour the pH scale and place the chemicals alongside the periodic table. As a plenary ask students to record which chemicals will neutralise each other (e.g. wasp sting --> Bee Sting).

Practise a controlled assessment in a fun and engaging way. Simple safe practical requiring Sugar, cups, hot and cold water. Train students to identify risks, control variables and write a method. Refer to slide 1 for lesson plan.

Practise a controlled assessment or practical in a fun and engaging way. Simple activity requiring effervescent tablets, balances, conical flask, rubber bungs and water. The worksheet encourages students to reflect on method and use data to support a conclusion. Students will identify equipment, control variables and write a method (hint sheet provided). Refer to slide 1 for lesson plan.

A PowerPoint with supporting instructions, starter and extension activities. Best if you use tealight candles. Encourages students to consider variables and to make accurate measurements. Students draw a graph to show their results. If students are difficult to motivate then ask them to estimate how long a candle would last in a specific volume (i.e. 300ml beaker) which they will have to produce a graph to extrapolate or interpolate to find this out. You could test a 300ml beaker at the end to test this. The extension activity promotes higher level scientific thought. It is unknown if the carbon dioxide smothers the candle or if the oxygen runs out first. Most students will say the taller candle as this will last longer!