Lesson Plan

• Recall the electric charge of each of the six quark flavours.
• State the charge of each corresponding antiquark as the opposite sign.
• Calculate the net charge of a given combination of quarks and antiquarks.

• Projector and screen
• Whiteboard and markers
• Printed handout with quark and antiquark charge tables
• Worksheet with practice charge calculations
• Calculator (optional)

Begin with a quick quiz question: “What charge does an up quark carry?” This activates prior knowledge of electric charge and particle basics. Explain that today’s focus is solely on remembering quark and antiquark charges and using them to determine total charge of particle combinations. Success will be measured by correctly completing the worksheet and exit ticket.

1. Do‑now (5 min): Students answer a short recall quiz on quark charges displayed on the board.
2. Direct instruction (10 min): Present the quark and antiquark charge tables using projector, highlighting the opposite‑sign relationship.
3. Guided practice (10 min): Work through the worked example (u \bar{d} s) together, prompting students to state each charge and perform the addition.
4. Independent practice (15 min): Students complete worksheet problems on calculating charges for various quark‑antiquark combos.
5. Formative check (5 min): Quick “show of hands” or clicker poll on selected answers to gauge understanding.
6. Summary & exit ticket (5 min): Students write one correct charge pair and one example calculation on a sticky note.

Review the key idea that antiquarks have opposite charges to their quark partners and that total charge is found by simple addition. Collect exit tickets to assess individual mastery. Assign homework: complete the remaining worksheet problems and bring any questions for the next class.