S1: Scope
Daily Estimation Challenge
Train your number sense by estimating answers before solving. Build mathematical intuition through calibration.
Daily Estimation Training
Build your number sense through calibrated estimation practice. The S1 Scope engine helps you develop mathematical intuition by training your brain to quickly estimate before calculating.
Start Practicing Now →How S1 Scope Works
1. See Problem
Quick flash of the math problem (2-3 seconds)
2. Estimate
Quickly estimate the answer range before solving
3. Solve
Calculate the actual answer accurately
4. Calibrate
See how close your estimate was and improve
Why Estimation Matters
🧠
Builds Number Sense
Estimation develops intuitive understanding of magnitude and relationships between numbers.
🎯
Catches Errors
Good estimators spot calculation mistakes immediately because the answer "feels wrong."
⚡
Real-World Math
From shopping to cooking, estimation is how we use math in daily life.