This learning resource helps students engage with large whole numbers through practical applications related to national park visitor counts. The objectives include comparing and ordering large numbers based on place value, estimating totals through rounding to the nearest million, and performing exact calculations involving multi-digit algorithms. The document presents the visitor counts of the Great Smoky Mountains, Grand Canyon, and Yellowstone, challenging students to order those counts, estimate totals, and compute exact sums and differences. The resource also encourages reflection on the reasonableness of their calculations and includes a challenge scenario that prompts students to analyze the impact of adding a new park with a specified number of visitors.