Use Diagrams to Compare
The purpose of this lesson is for students to use their understanding of bar graphs to interpret tape diagrams and solve Compare problems with the difference unknown within 20.
In this lesson, students use their understanding of bar graphs to make sense of a new representation, the tape diagram. The tape diagram is a representation that can be used by students to represent story problems. Students will use tape diagrams in grade 2 and throughout elementary, middle, and high school.
- Action and Expression
Activity 1: Party Time (Part 1)
- Solve Compare problems with an unknown difference within 20.
- Use understanding of bar graphs to make sense of tape diagrams.
- Let’s use bar graphs and diagrams to solve Compare problems.
Materials to Gather
Materials to Copy
- Party Time
|Activity 1||20 min|
|Activity 2||15 min|
|Lesson Synthesis||10 min|
Teacher Reflection Questions
The relationship between addition and subtraction is important as students develop fluency within 20 in grade 2. How did you use the tape diagram to help students build this understanding?
- Sort and Display (1–3), Stage 2: Picture or Bar Graphs (Addressing)
- Shake and Spill (K–2), Stage 5: Cover (up to 20) (Supporting)
Print Formatted Materials
Teachers with a valid work email address can click here to register or sign in for free access to Cool Down, Teacher Guide, and PowerPoint materials.
|Student Task Statements||docx|
|Lesson Cover Page||docx|
|Cool Down||Log In|
|Teacher Guide||Log In|
|Teacher Presentation Materials||docx|