Find the story in a graph
Use bar graphs to combine, separate and compare category counts.
Explore this lesson →8 practice questions · Optional read aloud · Thinking pad
Let’s understand the idea.
- The title says what was recorded. Category names say which groups; the number scale says how many.
- Choose the counts the question actually asks about. Join groups, find a missing part, or compare their counts.
- A longer bar means a larger count. Equal bars mean equal counts; no bar means zero, not missing data.
Something to notice
Observe children choosing physical objects, using a real ruler, recording each measurement and constructing their own labeled graphs. The built-in data sets and screen measurements are authored examples, not records of real children. Whole-unit measuring pictures avoid halfway ties. Picture keys and bar scales count by ones. Software can check the recorded values and graph counts; it does not assess physical measuring technique, handwriting, independent graph-title choices or oral explanations. Mapping and practiced counts do not establish mastery.
Try it. Change it. Explain it.
Open the lesson to use its pictures and controls. In How it works, connect the picture to the idea. In Play & discover, change the quantities and notice what stays the same. In Your turn, answer questions and use the explanation to check your reasoning.
You can ask for help, draw on the thinking pad, or listen to the question and answer options. Progress distinguishes independent work from work completed with help.
Let’s try it →Curriculum connection
Grade 2 · 2.MD · US Common Core
This lesson is mapped to these standards. A completed activity is practice evidence, not a claim of mastery. Content is checked against the linked official standards and its mathematical models are tested.