2nd to 3rd Edition: Kindergarten Changes

Changes to the Curriculum Components

Investigations 3 has eight units per grade. Each grade level consists of approximately 140 sessions. The Differentiation and Intervention Guide (2011), and Investigations and the Common Core Standards (2012), have been integrated into the curriculum units, eliminating these 2nd edition components. Support around the Standards for Mathematical Practice, differentiation for the range of learners, and assessment have been added or expanded. A new set of online tools includes e-texts, planning tools, digital presentations, games, and provides access for families. The Student Math Handbook is now a digital-only resource called Math Words and Ideas.

Investigations 3 at Kindergarten consists of 140 Sessions across 8 units.

  •       Unit 1: Counting People, Sorting Buttons (16 sessions)
  •       Unit 2: Counting Quantities, Comparing Lengths (22 Sessions)
  •       Unit 3: Make a Shape, Fill a Hexagon (12 Sessions)
  •       Unit 4: Collect, Count, and Measure (23 Sessions)
  •       Unit 5: Build a Block, Build a Wall (10 Sessions)
  •       Unit 6: How Many Now? (20 Sessions)
  •       Unit 7: How Many Noses? How Many Eyes? (15 Sessions)
  •       Unit 8: Ten Frames and Teen Numbers (22 Sessions)

Changes to the Content

Investigations 3 is based in large part on the 2nd edition of Investigations in Number, Data, and Space (2008). Content from Investigations and the Common Core Standards (2012) and the Differentiation and Intervention Guide (2011) has been integrated and, in many cases, expanded upon. Other material has been deleted, moved, or merged to create a focused, coherent, and rigorous K-5 mathematics curriculum, fully aligned to the content and practice standards of the Common Core State Standards (CCSS).

The following is not meant to be a comprehensive description of the Kindergarten curriculum, but rather a brief summary of the major changes.

Changes at the Unit Level

  • The three number units of the 2nd edition have expanded into four. These (and other) units include in depth attention to:
    • Story problems
    • Fluency with addition and subtraction within 5
    • Work with complements of 10
    • The teen numbers as ten ones and some number of ones
  • Weight is now included as part of the measurement work in Kindergarten.
  • The 2nd edition Geometry unit has become two separate units: one focused on 2-D geometry and the other on 3-D geometry. The 2-D unit no longer includes activities that use the Shapes software.
  • The 2nd edition unit that focused on patterns and functions is no longer a part of the Kindergarten sequence


Changes to the Classroom Routines

  • All Classroom Routines have been revised, with new variations occurring over the year to complement ongoing work.
  • The Attendance Routine includes a new variation, How Many Fingers?, focused on counting by 10s.
  • A new Classroom Routine, Story Problems, provides repeated practice making sense of and solving story problems; using addition and subtraction notation to represent a story; and telling a story for a given expression.
  • A new Classroom Routine, Counting on the Number Line, focuses on the rote sequence to 100, and on starting the count from any number.
  • The Classroom Routine Patterns on the Pocket Chart is no longer a part of the Kindergarten sequence.