Unit 6, Lesson 12
Comparemos medidas
Grado 1
Preparation
Lesson Narrative
In the previous lesson, students solved Compare, Difference Unknown story problems about length measurements. Students used connecting cubes, drawings, numbers, words, and equations to represent and solve these problems. They discussed how some problems can be solved using either addition or subtraction.
In this lesson, students solve two new problem types, Compare, Bigger Unknown and Compare, Smaller Unknown, through the context of measurement. They consider how a representation can be used to solve different story problems. Due to language demands of these types of problems, students will focus on Bigger Unknown versions with “more” and Smaller Unknown versions with “fewer.” Students are reintroduced to a diagram that may be helpful for Compare problems and prepares them for working with tape diagrams in grade 2.
- Representation
- MLR8
- Explain (orally) strategies for representing and solving Compare, Smaller Unknown and Compare, Bigger Unknown problems involving length.
- Resolvamos problemas-historia en los que comparamos longitudes.
Required Materials
Required Preparation
- Create a poster for the Lesson Synthesis with the problems from Activity 1 and Activity 2 and this unlabeled diagram shown two times:
Put each gameboard in a sheet protector.
Suggested Centers
NoneTeacher Reflection Questions
Unlike talking, listening is difficult to observe. At what points in the lesson did you observe students listening to one another’s ideas today in class? What indicators do you have that they were listening?