Third graders add a new marker to the Calendar Grid for each day of the month. Students delve into important mathematics as they identify patterns that emerge in the markers over time. Each month also features a collection of some kind—coins, shapes, cubes, increments of time, experimental data—that students use as a context for gathering and analyzing data using tally marks, frequency tables, graphs, and other displays.

Many days also feature an activity or game for building computational fluency, an activity based on a number line or grid, or a problem string (a carefully arranged sequence of related problems designed to elicit specific computation strategies and insights about number relationships).

Content Outline

August / September

  • Multiplication Models
  • Class Data
  • Loops & Groups
  • Up to One Thousand
  • Adding Two- and Three-Digit Numbers


  • Two-Dimensional Shapes
  • Collecting Liters & Milliliters
  • Frog Jump Multiplication
  • Changing Endpoints
  • Subtracting Two- & Three-Digit Numbers


  • Multiplication Arrays
  • Unit Fraction Race
  • Array Race
  • Rounding to the Nearest Ten
  • One-Step Story Problems with Equations


  • Unit Fraction Squares
  • Collecting Grams
  • Fact Fluency for Multiplying by Zero, One & Two
  • Rounding to the Nearest Hundred
  • Multiplying with the Distributive Property


  • Equivalent Fractions
  • Collecting Minutes & Hours
  • Fact Fluency for Multiplying by Ten & Five
  • Benchmark Fractions on a Number Line
  • Multi-Step Problems & Equations 


  • Investigating Area & Perimeter
  • Collecting Fractions of a Dollar
  • Fact Fluency for Multiplying by Three, Four & Eight
  • Comparing Fractions
  • Data Problems


  • Time & Data Displays
  • Area & Perimeter of Rectilinear Figures
  • Fact Fluency for Multiplying by Six & Nine
  • Find the Fraction
  • Area & Perimeter Puzzles


  • More Equivalent Fractions
  • Collecting Fractions of an Hour
  • Quick Facts & Games
  • Put It on the Line
  • Multiplication & Division Practice


  • Fractions & Area with Rectilinear Figures
  • Roll & Multiply
  • More Quick Facts & Games 
  • Put It on the Line with Fractions & Mixed Numbers
  • More Multiplication & Division Practice