Unit 4, Lesson 3
Marcas sin números
Grado 2
Preparation
Lesson Purpose
The purpose of this lesson is for students to represent numbers within 100 on number lines that do not label each tick mark.
Lesson Narrative
In a previous lesson, students were introduced to the number line and represented the location of numbers with labeled tick marks and points up to 20.
In this lesson, students use multiples of 5 and 10 to locate numbers up to 100 on the number line. Students leverage their understanding of skip counting by 5 and 10 to locate numbers and build on their understanding of the number line as a representation that includes all numbers. In future lessons, students will estimate numbers on a number line without any tick marks by approximating the location of the number relative to the position of represented numbers.
- Action and Expression
- MLR2
- Explain (orally) how to locate a whole number on a number line that does not label each number.
- Interpret (orally) number lines with unlabeled tick marks, including those that do not start at 0.
- Ubiquemos números en la recta numérica.
Required Preparation
None
Teacher Reflection Questions
How effective were your questions in supporting students’ thinking about the structure of the number line today? What did students say or do that showed they were effective?
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