Mathematics
Counting & Cardinality
14 lessons · topologically ordered (prerequisites first).
- 1One-to-one countingAges 4–6 · high
- 2How Many in Total?Ages 4–6 · high
- One-to-one counting (hard)
- 3Rote counting to 100Ages 5–6 · high
- One-to-one counting (hard)
- 4Counting objects to 20Ages 5–6 · high
- How Many in Total? (hard)
- One-to-one counting (hard)
- 5Representing numbers with objectsAges 4–6 · med
- How Many in Total? (hard)
- 6One More Each TimeAges 4–6 · med
- How Many in Total? (hard)
- 7Counting in 2sAges 5–7 · high
- Rote counting to 100 (hard)
- 8Comparing groups: more or fewerAges 4–6 · high
- Counting objects to 20 (soft)
- 9Skip Counting (4s, 8s, 50s, 100s)Ages 7–8 · high
- Counting in 2s (hard)
- 10Counting Within 1,000Ages 7–8 · high
- Counting in 2s (hard)
- 11Counting forwards and backwards (age 6+)Ages 6–7 · med
- Counting in 2s (hard)
- 12Counting forwards and backwardsAges 6–7 · low
- Counting in 2s (hard)
- 13Two written numerals between 1 and 10Ages 5–6 · high
- Comparing groups: more or fewer (soft)
- 14Counting in 6sAges 8–9 · high