Second graders learn to measure length with standard units — inches and centimeters — using a ruler, estimating first, and comparing lengths, building real measurement skills.
Students will be able to…
In first grade we measured with cubes — but how do grown-ups measure so everyone agrees? With rulers and standard units like inches and centimeters!
Project this and tap each idea about measuring with rulers and standard units. Practice estimating and reading a ruler!
Tap any phase to open the teacher moves and student actions.
Cubes work — but how do grown-ups measure the SAME way?
Teacher models.
Class uses the Length Explorer.
Students measure.
One measurement.
Aligned to the Common Core State Standards for Mathematics.
Measure the length of an object using a ruler, yardstick, or measuring tape.
Measure the length of an object twice using different units.
Estimate lengths using inches, feet, centimeters, and meters.
Measure to determine how much longer one object is than another.
Preview the three formative checks. Tap “Sample answer” to see what mastery looks like — hide them before you print for students.
Have students measure the same object in both inches and centimeters and notice they get different numbers because the units are different sizes. A printable ruler sheet is in the Math library.
Tap a card to flip it, then rate whether you knew it. Built from this lesson’s vocabulary.
A quick self-check with instant feedback, drawn from this lesson’s key terms.
A print-and-go review sheet with a built-in answer key. Tap “Show answer key” to reveal answers, or print the clean version for students.