Grade 2Glossary
 a third
 Unit 6 Lesson 7
One piece of a shape split into 3 pieces that are the same size.
A third of the rectangle is shaded.
 array
 Unit 8 Lesson 7

An arrangement of objects in rows and columns. Each column must contain the same number of objects as the other columns, and each row must have the same number of objects as the other rows.
 bar graph
 Unit 1 Lesson 9, Unit 1 Lesson 11
A way to show how many in each group or category using the length of rectangles.
 centimeter
 Unit 3 Lesson 1, Unit 3 Lesson 6

A length unit in the metric measurement system. There are 100 centimeters in a meter.
 data
 Unit 1 Lesson 7, Unit 1 Lesson 11
Information about the things or people in a group.
Example: If you have a box of colored pencils, then the lengths and colors of each of the pencils are data about the pencils in the box.
 even
 Unit 8 Lesson 2
A number is even if that number of objects can be split into two equal groups or made into pairs without any objects left over.
 expanded form
 Unit 5 Lesson 5
A specific way of writing a number as a sum of hundreds, tens, and ones.
Expanded form writes a number as a sum of the value of each digit. Example: 482 written in expanded form is
.  foot
 Unit 3 Lesson 9

A length unit in the U.S. customary measurement system.
There are 12 inches in a foot.
 hexagon
 Unit 6 Lesson 1

A shape with 6 sides and 6 corners.
 inch
 Unit 3 Lesson 8

A length unit in the U.S. customary measurement system.
There are 12 inches in a foot.
 line plot
 Unit 3 Lesson 16
A way to show how many of each measurement using an x for each measurement.
 meter
 Unit 3 Lesson 5

A length unit in the metric measurement system.
There are 100 centimeters in a meter.
 number line
 Unit 4 Lesson 1

A diagram that represents numbers as lengths from 0 using equally spaced tick marks or points.
 odd
 Unit 8 Lesson 2
A number is odd if that number of objects cannot be split into two equal groups or made into pairs without any objects left over.
 pentagon
 Unit 6 Lesson 1
A shape with 5 sides and 5 corners.
 picture graph
 Unit 1 Lesson 8, Unit 1 Lesson 11
A way to show how many in each group or category using pictures of the objects or symbols.
 quadrilateral
 Unit 6 Lesson 1
A shape with 4 sides and 4 corners.