Subitizing, Ten-Frames, and Conservation of Quantity

Instantly recognize structured quantities up to 20 without one-to-one counting and explain how quantity remains unchanged under spatial transformations.

Read, recite, and write sequences forward and backward from any starting number up to 120, extending patterns to 1,000 using number lines and charts.

Skip-count forward and backward by 2s, 5s, and 10s to quantify collections up to 120, identify even and odd numbers, and explore grid patterns.

Identify and use ordinal numbers from first through twentieth and beyond to specify positions, determine relative ranks, and connect rank to preceding cardinal quantities.