BIG Ideas Students Develop about Math in Grade 3

In third grade, there are a few BIG ideas students learn and that are the foundation for future learning in mathematics:

• Round numbers to nearest 10 or 100
  • How? Rounding Numbers to Nearest 10 or 100 on a Number Line
• Use a variety of strategies to add and subtract problems within 1000
  • How? Using Place Value as a Strategy to Add
• Understand how to find area of a shape and connect to multiplication and addition
  • How? Finding Area
  • How? Decomposing a Shape to Find Area
• Understand meaning of multiplication and division
  • How? Understanding Multiplication with Arrays
  • How? Using Models to Show Multiplication
  • How? Understanding Division
• Use a variety of strategies to build fluency of basic multiplication and division facts
  • How? Connecting Multiplication and Division
• Multiply one digit numbers by multiples of 10
  • How? Get to 1000 Game to Teach Multiples of 10
• Basics of fractions, understanding that a whole can be broken into equal parts
  • How? Getting Kids to Understand a "Unit" Fraction
  • How? Using Models to Explore Unit Fractions
• Build models of fractions with shapes or on a number line
  • How? Area Models of Fractions
  • How? Showing Fractions on a Number Line
• Understand simple equivalent fractions
  • How? Understanding Equivalent Fractions
  • How?2 Finding Equivalent Fractions
• Compare fractions with the same denominators
  • How? Comparing Fractions with Like Denominators

BIG IDEAS in 2nd GRADE