A lesson on how to balance word and symbol equations could be used for KS3 or GCSE. I uses chemical reactions between acids and metals to help guide students on how to name salts.
first lesson on the new 9-1 GCSE chemistry spec students learn about the atomic symbols from the periodic table and how to use them correctly. The plenary is bingo using the periodic table.
A full lesson where students investigate the energy in different foods, students can pool data together using the excel spreadsheet and draw a graph of the results. Very good for how science works style lesson.