Help students develop strong mental math skills through engaging estimation and calculation practice. **Topics Included:** • Thank You • Estimating angles in geometry • Estimating percent increase and decrease • Estimating percentages • Estimating speed and time • Estimating sums and differences • Estimating time and schedules • Estimating within reasonable ranges • Estimation in data analysis • Estimation in data collection • Estimation in geometry • Estimation in probability • Estimation in r