Proportional Reasoning
Big Ideas
Qualitative comparison: Descriptive comparison (Ex: The blue line is bigger than the black line)
Additive comparison: Basic Addition/subtraction to compare (Ex: The blue line is 5cm longer than the black line)
Multiplicative comparison: Multiplication used to compare (Ex: The blue line is twice as long than the black line)
Models
Subtopic
Strategies
Looking at/comparing size
Identifying more/less than
Identifying ratios
- Recognizing multiplicative comparisons between ratios.
- Proportional relationships can be expressed using fractions, ratios, and percents.
- Students begin to develop the ability to reason proportionally through informal activities.
