3. Addition
4. Subtraction
6. Division
7. Fractions
8. Measurement
8.1.1. Metric Units of Length
8.1.2. Measure Using a Ruler
8.1.4.1. Addition of Lengths
8.1.4.2. Subtraction of Lengths
8.1.5. Word Problems on Lengths
9. Time
10. Geometry
11. Symmetry
12. Data Handling