The purpose of this warm-up is to invite students to share what they know about inches. Later in the lesson, students will explore lengths that are not a whole-number of inches.
Launch
Display the question.
“What do you know about inches?”
1 minute: quiet think time
Teacher Instructions
Record responses.
Student Task
What do you know about inches?
Sample Response
Sample responses:
They are used to measure length.
There are inch marks on rulers, yardsticks, and tape measures.
They are shorter than feet.
They are longer than centimeters.
Synthesis
“Inches are a unit we use to measure length. What are some lengths that we could use inches to measure?“ (the length of a shoe, the length of material for an art project, the height of a desk)
Standards
Building On
2.MD.3·Estimate lengths using units of inches, feet, centimeters, and meters.
2.MD.A.3·Estimate lengths using units of inches, feet, centimeters, and meters.
Building Toward
3.MD.4·Generate measurement data by measuring lengths using rulers marked with halves and fourths of an inch. Show the data by making a line plot, where the horizontal scale is marked off in appropriate units— whole numbers, halves, or quarters.
3.MD.B.4·Generate measurement data by measuring lengths using rulers marked with halves and fourths of an inch. Show the data by making a line plot, where the horizontal scale is marked off in appropriate units–-whole numbers, halves, or quarters.