Ohio

PK.2 Mathematics

• PK.2.1 Number Sense

  • PK.2.1.1 Number Sense and Counting

    • PK.2.1.1.a Count to 20 by ones with increasing accuracy.

      • Count pictures - up to 5 (P-B.3)
      • Count dots - up to 5 (P-B.4)
      • Count shapes in rows - up to 5 (P-B.5)
      • Count pictures - up to 10 (P-C.3)
      • Count dots - up to 10 (P-C.4)
      • Count shapes in rows - up to 10 (P-C.5)
      • Count pictures - up to 20 (P-D.2)
      • Count dots - up to 20 (P-D.3)
      • Count shapes - up to 20 (P-D.4)

    • PK.2.1.1.b Identify and name numerals 1-9.

      • Names of numbers - up to 10 (K-C.30)

    • PK.2.1.1.c Identify without counting small quantities of up to 3 items. (Subitize)

      • Count pictures - up to 3 (P-A.3)
      • Count dots - up to 3 (P-A.4)
      • Count shapes - up to 3 (P-A.5)
      • Represent numbers with pictures - up to 3 (P-A.9)

    • PK.2.1.1.d Demonstrate one-to-one correspondence when counting objects up to 10.

      • Represent numbers with pictures - up to 3 (P-A.9)
      • Represent numbers with pictures - up to 5 (P-B.12)
      • Count pictures - up to 10 (P-C.3)
      • Represent numbers - up to 10 (P-C.13)
      • Count blocks - up to 10 (K-C.8)

    • PK.2.1.1.e Understand that the last number spoken tells the number of objects counted.

      • Represent numbers with pictures - up to 3 (P-A.9)
      • Represent numbers with pictures - up to 5 (P-B.12)
      • Represent numbers - up to 10 (P-C.13)
      • Represent numbers - up to 20 (P-D.7)

    • PK.2.1.1.f Identify whether the number of objects in one group is greater than, less than or equal to the number of objects in another group up to 10.

      • More (P-E.1)
      • Fewer and more - compare by counting (P-E.4)
      • Fewer and more - compare in a mixed group (P-E.5)

• PK.2.2 Number Relationships and Operations

  • PK.2.2.1 Number Relationships

    • PK.2.2.1.a Count to solve simple addition and subtraction problems with totals smaller than 8, using concrete objects.

      • Add with pictures - sums up to 5 (K-J.6)
      • Add with pictures - sums up to 10 (K-K.8)
      • Subtract with pictures - numbers up to 5 (K-L.3)
      • Subtract with pictures - numbers up to 10 (K-M.3)

• PK.2.3 Algebra

  • PK.2.3.1 Group and Categorize

    • PK.2.3.1.a Sort and classify objects by one or more attributes (e.g., size, shape).

      • Different (P-G.1)
      • Same (P-G.2)
      • Same and different (P-G.3)
      • Classify shapes by color (P-G.4)

  • PK.2.3.2 Patterning

    • PK.2.3.2.a Recognize, duplicate and extend simple patterns using attributes such as color, shape or size.

      • Shape patterns (K-I.3)
      • Complete a pattern (K-I.5)
      • Find the next row in a growing pattern (K-I.8)

    • PK.2.3.2.b Create patterns.

      • Shape patterns (K-I.3)
      • Complete a pattern (K-I.5)

• PK.2.4 Measurement and Data

  • PK.2.4.1 Describe and Compare Measureable Attributes

    • PK.2.4.1.a Describe and compare objects using measureable attributes (e.g., length, size, capacity and weight).

      • Long and short (P-I.1)
      • Tall and short (P-I.2)
      • Wide and narrow (P-I.3)
      • Light and heavy (P-I.4)
      • Holds more or less (P-I.5)

    • PK.2.4.1.b Order objects by measureable attribute (e.g., biggest to smallest, etc.).

      • Compare size, weight, and capacity (P-I.6)

    • PK.2.4.1.c Measure length and volume (capacity) using non-standard or standard measurement tools.

      • Measure length with objects (K-U.7)
      • Measure using an inch ruler (1-Q.10)
      • Measure using a centimeter ruler (1-Q.14)

  • PK.2.4.2 Data Analysis

    • PK.2.4.2.a Collect data by categories to answer simple questions.

      • Which picture graph is correct? (K-S.1)
      • Interpret picture graphs (K-S.2)

• PK.2.5 Geometry

  • PK.2.5.1 Spatial Relationships

    • PK.2.5.1.a Demonstrate understanding of the relative position of objects using terms such as in/on/under, up/down, inside/outside, above/below, beside/between, in front of/behind and next to.

      • Inside and outside (P-F.1)
      • Left and right (P-F.2)
      • Left, middle, and right (P-F.3)
      • Top and bottom (P-F.4)
      • Above and below (P-F.6)

  • PK.2.5.2 Identify and Describe Shapes

    • PK.2.5.2.a Understand and use names of shapes when identifying objects.

      • Squares (P-K.4)
      • Circles, squares, and triangles (P-K.6)
      • Name the solid shape (P-L.2)

    • PK.2.5.2.b Name three-dimensional objects using informal, descriptive vocabulary (e.g., "cube" for box, "ice cream cone" for cone, "ball" for sphere, etc.).

      • Shapes of everyday objects I (K-X.9)

  • PK.2.5.3 Analyze, Compare and Create Shapes

    • PK.2.5.3.a Compare two-dimensional shapes, in different sizes and orientations, using informal language.

      • Squares (K-W.4)
      • Compare sides and corners (K-W.14)

    • PK.2.5.3.b Create shapes during play by building, drawing, etc.

    • PK.2.5.3.c Combine simple shapes to form larger shapes.