Students will launch the snack-count investigation by exploring real cafeteria-style counting situations, trying early addition and subtraction strategies within 20, and using a short partner-and-class huddle to name questions, share evidence, and prepare for deeper snack-count problem solving in the next phase.

Students will investigate a classroom snack mystery by asking focused counting questions, testing addition and subtraction methods with objects and drawings, comparing evidence with classmates and a cafeteria partner, and documenting a simple method they can use to find how many are needed, left, and altogether within 20.

Students will gather and organize snack-count evidence from classroom and cafeteria scenarios, use drawings, counters, and equations to record how many are needed, left, and altogether, and improve accuracy through partner checks, feedback huddles, and a midpoint cafeteria check before deeper analysis.

Students will analyze their snack-count evidence, turn their findings into clear placemats and posters, defend their strategies with objects, drawings, and equations, revise after peer and cafeteria feedback, and complete a checkpoint showing they can solve and explain addition and subtraction situations within 20.

Students will present their cafeteria math findings and snack-time placemats to families and the cafeteria partner, demonstrate how they solve needed, left, and altogether problems within 20, respond to audience questions with evidence, complete the snack-count check, and reflect in a short huddle on progress and next steps.