number sense
저자: Brittney Crowe
1. standard counting
1.1. by ones
1.1.1. by tens
2. grouping
2.1. separating
2.1.1. sorting
2.1.1.1. comparing
3. recognizing numbers
3.1. writing
3.2. adding
3.2.1. subtracting
4. real world
4.1. time
4.1.1. money