Curated OER
Oxidation/Reduction Reactions
In this chemical reactions instructional activity, students review the oxidation number rules and then assign oxidation numbers to atoms in given compounds. Students identify the reducing agent and the oxidizing agent in reactions....
Royal Society of Chemistry
Royal Society of Chemistry: Gridlocks: Level 3
A collection of grid puzzles that cover a wide variety of topics in advanced high school chemistry. These are excellent for topic review and reinforcement. The puzzles can be played online and also downloaded as worksheets. Answers are...