Measure. Stack. See the data.

SparkClass

Measure an object. Add one × above its length.

CCSS 2.MD.D.9
Measurement Bench
Simulated Measurement
Pencil
Ready to measure
Your Line Plot
× one object measurement
00

Start with one object. Measure it. One measurement adds one ×.

Measurements0
Longest—
Shortest—
Most Common—
Longest − Shortest—
Measurement Log · Every × Is Listed0 ×
No measurements yet. Your first object will appear here.

From objects to measurement data

This lab uses simulated measurements: every object has a preset whole-number length. The ruler animation does not generate random values. Custom lengths are explicitly treated as entered data.

1

Build the plot one measurement at a time

Start with the Desk set and select Measure next object six times. The result should be 6 × marks: one at 4, three at 5, one at 6, and one at 7. Longest = 7, shortest = 4, most common = 5, and longest − shortest = 3.

2

Make repeated measurements visible

Select Repeat last object. The same object is measured again, so another × and another log entry appear. Ask, “Did the object change? What changed in our data?”

3

Read the shape, not just the total

Ask students to find the tallest stack, compare the shortest and longest lengths, and explain the difference. If several lengths tie for tallest, Most common lists all of them.

4

Use presets and units deliberately

Presets replace the objects and clear the plot; they do not pre-fill the data. Changing cm/in also clears the plot rather than pretending to convert the values. For a physical lesson, replace the simulation with real objects and a ruler, then use custom lengths to record actual measurements.

CCSS 2.MD.D.9: Generate measurement data by measuring lengths of several objects to the nearest whole unit, or by making repeated measurements of the same object. Show the measurements by making a line plot, where the horizontal scale is marked off in whole-number units.