Lesson Plan

• Describe the general properties and IUPAC nomenclature of alkenes.
• Explain the mechanisms and regiochemical outcomes of major electrophilic addition reactions (halogenation, hydrohalogenation, hydration, hydroboration‑oxidation, ozonolysis, hydrogenation).
• Predict stereochemical (syn/anti) and regioselective results for given alkene reactions.
• Apply carbocation stability concepts to rationalise Markovnikov vs anti‑Markovnikov addition.
• Solve problems that require selecting appropriate conditions and drawing products from the reaction tables.

• Projector and screen
• Whiteboard and markers
• Handout with reaction tables and mechanisms
• Molecular model kits
• Sample reagents for safe demonstration (e.g., dilute Br₂, HCl)
• Worksheet with practice problems
• Exit‑ticket cards

Start with a quick think‑pair‑share asking students to list everyday products that originate from alkenes, linking to their prior knowledge of alkanes and double bonds. Review that the C=C bond is a region of high electron density and set the success criteria: students will name key reactions, draw mechanisms, and predict products with correct regiochemistry and stereochemistry.

1. Do‑now (5') – short quiz on alkene formulas, geometry and IUPAC naming.
2. Mini‑lecture (10') – overview of electrophilic addition mechanisms with energy‑profile diagram.
3. Guided practice (15') – work through halogenation and hydrohalogenation examples on the whiteboard, highlighting carbocation intermediates.
4. Interactive simulation (10') – online model to compare Markovnikov vs anti‑Markovnikov addition.
5. Group activity (15') – analyse hydration, hydroboration‑oxidation, ozonolysis and hydrogenation reactions; fill a comparative table.
6. Check for understanding (5') – rapid polling (Kahoot) on stereochemical outcomes.
7. Summary & exit ticket (5') – students write one key takeaway and answer a problem on product prediction.

Recap the central role of the π‑bond in governing reactivity, the importance of carbocation stability for regiochemistry, and the distinction between syn and anti additions. Collect exit tickets to gauge individual understanding, and assign homework: complete the worksheet on reaction conditions and draw mechanisms for two unseen alkenes.