Which Tool Will You Use?

Students measure the lengths of objects in centimeters with base-ten units and tens rods and compare the tools. Note: Activity 2 was updated in the Teacher Edition PDF and in the Teacher Presentation Screens on 1/12/2026.

By Amplify Classroom

Grades: 2nd Grade

Subject: Math

Learning goals: Today’s Goals • Measure the lengths of objects in centimeters with centimeter cubes and `10`-centimeter rods. • Determine how much longer 1 object is than another. • Language Goal: Compare different tools used to measure length. (Speaking and Listening) Materials Lesson Resources: Activity 1 PDF, Activity 2 PDF; Manipulative Kit: base-ten units, tens rods; Classroom materials: chart paper, markers, Measurement Collect and Display chart (teacher made)