Grade 1 · Number
Number Concepts to 20
Numbers to 20 build directly on Kindergarten foundations. The key conceptual leap is base 10: 13 is not just a symbol but one group of ten and three more. Double ten-frames make this structure visible. Students who truly understand ten-and-some-more are equipped for place value, addition, and subtraction across the curriculum.
LESSON VIDEO
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Lesson video
A short walkthrough to play in class or assign for flipped/at-home viewing.
WHAT STUDENTS WILL LEARN
✓Count forward and backward from any number to 20, including counting on and counting back
✓Sequence, compare, and order numbers to 20 using benchmarks of 10 and 20
✓Subitize quantities to 10; recognize numbers 11-20 as 10 and some more
✓Skip-count by 2s and 5s starting from 0 and from other starting points
✓Understand base 10 structure: 13 = one ten and three ones
✓Count to 20 in more than one language, including local First Peoples languages
BUILDS ON