Go Math! Grade 2, Chapter 10: Data
In this unit, your child collects data, information gathered by asking questions or measuring, and shows it in tally charts, picture graphs, bar graphs, and line plots. They read each graph to answer how many in all and how many more. It uses the measuring from the last two parts of the year and leads into shapes and fractions next.
By Robert “Bobby” BarnettMath teacher, parent, and founder of Bobby’s Math Club
What is my child learning in Chapter 10?
- Measuring objects to the nearest inch or centimeter and showing all the lengths on a line plot. Learn more: Measuring things and making a line plot
- Collecting answers in a tally chart, drawing picture graphs and bar graphs, and comparing the categories. Learn more: Making and reading picture graphs and bar graphs
Sample questions to try together
These are real questions from our practice. Tap the speaker to hear one read aloud, or the light bulb for a hint, and talk about the answer together.
Question 1 of 3
Sarah measured the length of her crayons. She found lengths of 5 inches, 6 inches, 5 inches, 7 inches, and 6 inches. How many crayons were 5 inches long?
- 2
- 5
- 1
How you can help
- Take a quick survey of family or friends, such as favorite breakfast, and help your child make tally marks and then a bar graph.
- Measure a few toy cars or pencils to the nearest inch and draw a line plot together, with an X for each one.
- Make a picture graph together of the fruit in the kitchen, then ask questions about it, like "How many more apples than bananas are there?"
Where kids can get stuck
- Drawing picture graph symbols in different sizes, so one row looks bigger than it really is.
- Adding the two bars when asked how many more one category has.
- Spacing the numbers unevenly on a line plot, or skipping a number nobody measured.
Practice makes perfect
Bobby's Math Club has practice problems that adapt to your child’s level, each with a detailed explanation and an easy-to-follow video, so your child can build confidence in these skills one step at a time.
Words your child will hear
- data
- Information collected by counting, measuring, or asking questions.
- tally chart
- A chart that uses tally marks, grouped in fives, to count answers.
- survey
- Asking people a question and collecting their answers.
- picture graph
- A graph that uses small pictures to show how many are in each group.
- bar graph
- A graph that uses bars of different lengths to show and compare amounts.
- line plot
- A number line with an X above it for each measurement collected.
- category
- One group on a graph, like apples or bananas.
- key
- The part of a graph that tells what each picture stands for.
Want to help your child master reading graphs?
In Bobby's Math Club, your child practices these skills at just the right level, with a hint when they need one, a clear explanation after every question, and kid-friendly videos. Unlimited practice is free.
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Written by Robert “Bobby” Barnett
Bobby is an award-winning math teacher, the author of Meet Every Learner’s Needs, and the father of two elementary-school math learners. He uses Bobby’s Math Club with his own kids a few times every week. Learn more or contact Bobby.
Which math standards does Go Math! Grade 2 Chapter 10 cover?
Go Math! Grade 2 Chapter 10 covers these math standards. Each one links to what it means, sample questions, and teaching strategies.
For teachers: Unit names and order vary between editions and districts, so your school’s own materials have the exact sequence. Learn how Bobby's Math Club can help your students grow.