Unit 4, Lesson 3
Unlabeled Tick Marks
Grade 2
Preparation
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 number lines. 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.
- Let’s locate numbers on the number line.
Required Preparation
None
Teacher Reflection Questions
How effective were your questions in supporting students’ thinking about the structure of number lines today? What did students say or do that showed they were effective?