Go Math! Grade 2, Chapter 11: Geometry and Fraction Concepts
In this unit, the year finishes with geometry and fraction concepts. Your child names shapes like quadrilaterals, pentagons, hexagons, and cubes by counting sides, angles, and faces. They split rectangles into rows of equal squares, and divide shapes into halves, thirds, and fourths. This is your child's first real look at fractions, which grow much bigger in 3rd grade.
By Robert “Bobby” BarnettMath teacher, parent, and founder of Bobby’s Math Club
What is my child learning in Chapter 11?
- Identifying and drawing shapes from their number of sides, angles, or faces, including cubes and hexagons. Learn more: Naming triangles, hexagons, cubes, and more
- Partitioning a rectangle into equal-size squares in rows and columns and finding the total. Learn more: Splitting a rectangle into rows of squares
- Splitting shapes into equal parts, naming them halves, thirds, and fourths, and seeing a whole as two halves. Learn more: Halves, thirds, and fourths of shapes
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
Which of these shapes has exactly three angles?
- Hexagon
- Triangle
- Square
How you can help
- Look for quadrilaterals at home, like doors, books, and tiles, and talk about how they all have four sides even when they look different.
- Draw a rectangle and ask your child to split it into 2 rows of 3 equal squares, then count the squares.
- Fold a strip of paper into three equal parts, ask your child to name one part, and compare it with half of a same-size strip.
Where kids can get stuck
- Counting the same corner twice when finding sides and angles, because they started and stopped at different places.
- Believing equal shares must be the same shape, not just the same size.
- Thinking a fourth is bigger than a half because 4 is bigger than 2.
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
- quadrilateral
- Any flat shape with 4 straight sides and 4 angles.
- pentagon
- A flat shape with 5 straight sides and 5 angles.
- hexagon
- A flat shape with 6 straight sides and 6 angles.
- angle
- The corner where two sides of a shape meet.
- cube
- A solid shape with 6 square faces that are all the same size.
- face
- A flat side of a solid shape. A cube has 6 faces.
- equal parts
- Pieces of a whole that are all the same size.
- third
- One of three equal shares of a whole.
- fourth
- One of four equal shares of a whole, also called a quarter.
Want to help your child master geometry and fractions?
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 11 cover?
Go Math! Grade 2 Chapter 11 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.