Unit 1, Lesson 13
Usemos gráficas de barras para comparar
Grado 2
Preparation
Lesson Narrative
In grade 1, students use the relationship between addition and subtraction to solve and represent Compare problems. Students create diagrams and write equations to represent how they think about the quantities within the Compare problems. In this lesson, students interpret bar graphs and use their visual structure to compare quantities. They write equations to represent comparisons and connect these equations to the structure of the bar graph (MP2). In upcoming lessons, students will use bar graphs to make sense of tape diagrams to represent Compare problems.
- Representation
- MLR8
- Use a bar graph to solve Compare, Unknown Difference problems within 20 and represent comparisons with an equation.
- Use “more” and “fewer” to compare (orally and in writing) data represented in a bar graph.
- Usemos gráficas de barras para resolver problemas de comparación.
Required Preparation
None
Teacher Reflection Questions
In future lessons, students will make sense of tape diagrams to represent Compare problems.
How does the work with the bar graphs today help build students’ understanding of this more abstract diagram?