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