i-Ready Classroom Mathematics Grade 2, Unit 6: Geometry and Arrays
In this unit, the year closes with shapes, arrays, and equal shares. Your child names shapes by their sides, angles, and faces, splits rectangles into rows of squares, and divides shapes into halves, thirds, and fourths. They use arrays to add equal rows and decide whether numbers are odd or even. Multiplication, area, and fractions all build on this in 3rd grade.
By Robert “Bobby” BarnettMath teacher, parent, and founder of Bobby’s Math Club
What is my child learning in Unit 6?
- Deciding whether a group of up to 20 objects is odd or even, using pairs or two equal rows. Learn more: Odd and even numbers
- Writing an addition equation for an array, such as 5 + 5 + 5 + 5 = 20 for 4 rows of 5. Learn more: Counting objects in equal rows by adding
- Recognizing and drawing triangles, quadrilaterals, pentagons, hexagons, and cubes from their sides, angles, and faces. Learn more: Naming triangles, hexagons, cubes, and more
- Splitting rectangles into rows and columns of same-size squares and counting the squares row by row. Learn more: Splitting a rectangle into rows of squares
- Splitting circles and rectangles into halves, thirds, and fourths and seeing that a whole is two halves or four fourths. 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
Is 16 an even or odd number?
- Even
- Odd
- Neither
How you can help
- Line up toys in two equal rows and ask whether the number is odd or even. Add one more toy and ask again.
- Find arrays in egg cartons, muffin tins, or window panes, and ask your child to add the rows to get the total.
- Fold a paper square into fourths two different ways, once into strips and once into small squares, and ask whether both sets of pieces are fourths.
Where kids can get stuck
- Counting an array one by one instead of adding the rows, and losing their place.
- Naming only regular shapes, unsure that a stretched shape with five sides is still a pentagon.
- Thinking two halves of a square must match in shape to count as halves.
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
- odd
- A number that can't be split into pairs without one left over, like 7.
- even
- A number that can be split into pairs with none left over, like 8.
- array
- Objects arranged in equal rows and columns.
- row
- A line of objects going across.
- column
- A line of objects going up and down.
- quadrilateral
- Any flat shape with 4 straight sides and 4 angles.
- pentagon
- A flat shape with 5 straight sides and 5 angles.
- half
- One of two equal shares of a whole.
- fourth
- One of four equal shares of a whole, also called a quarter.
Ready to build your child’s confidence with shapes and arrays?
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.
Join the club
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 i-Ready Classroom Mathematics Grade 2 Unit 6 cover?
i-Ready Classroom Mathematics Grade 2 Unit 6 covers these math standards. Each one links to what it means, sample questions, and teaching strategies.
- 2.OA.C.3: Determine whether a group of objects (up to 20) has an odd or even number of members.
- 2.OA.C.4: Use addition to find the total number of objects arranged in rectangular arrays.
- 2.G.A.1: Recognize and draw shapes having specified attributes.
- 2.G.A.2: Partition a rectangle into rows and columns of same-size squares.
- 2.G.A.3: Partition circles and rectangles into two, three, or four equal shares.
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.