Students will experience rounding in action through a fast-paced challenge and develop a focused, investigable research question about how rounding to the nearest ten or hundred affects grocery budget estimates.

Students will design a clear, step-by-step investigation plan to answer their rounding and budgeting research question by selecting an appropriate method, identifying variables, and creating a detailed data collection plan that will guide Phase 3.

Students will systematically collect and document grocery price data, apply rounding to the nearest ten and hundred using place value understanding, and conduct quality checks to ensure their data is complete and accurate before analysis.

Students will analyze their grocery price data to identify patterns between exact totals and rounded estimates, create visual representations, and interpret whether their evidence supports their original hypothesis about how rounding affects budgeting decisions.

Students will finalize their rounding investigation by drawing evidence-based conclusions about how rounding to the nearest ten and hundred affects a grocery budget, acknowledging limitations, generating new questions, and presenting their findings to an authentic audience through the "Rounding Revelations" digital exhibition.