A vertical number-line adventure where students place values on a mountain-and-ocean scale that always reads zero at the dock. K-1 works with whole numbers to 20; 2-3 adds negatives and numbers to 100; 4-5 extends to 1,000 with a dedicated decimal-progression mode (tenths and hundredths). Each session ends in a printable receipt with a QR-linked completion check.
A vertical number line adventure

A vertical number-line adventure where students place values on a mountain-and-ocean scale that always reads zero at the dock. K-1 works with whole numbers to 20; 2-3 adds negatives and numbers to 100; 4-5 extends to 1,000 with a dedicated decimal-progression mode (tenths and hundredths). Each session ends in a printable receipt with a QR-linked completion check.