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Math: Enriching Geometry Understanding and Introducing Area

Suggested Time Frame: 17 Instructional Days

        

Focus TEKS

Attributes of 3-D Figures

  • 2.8B classify and sort three-dimensional solids, including spheres, cones, cylinders, rectangular prisms (including cubes as special rectangular prisms), and triangular prisms, based on attributes using formal geometric language
    • 2.8D compose two-dimensional shapes and three-dimensional solids with given properties or attributes

Attributes of 2-D Figures

  • 2.8C classify and sort polygons with 12 or fewer sides according to attributes, including identifying the number of sides and number of vertices
    • 2.8A create two-dimensional shapes based on given attributes, including number of sides and vertices
    • 2.8D compose two-dimensional shapes and three-dimensional solids with given properties or attributes
    • 2.8E decompose two-dimensional shapes such as cutting out a square from a rectangle, dividing a shape in half, or partitioning a rectangle into identical triangles and identify the resulting geometric parts

Measure Area

  • 2.9F use concrete models of square units to find the area of a rectangle by covering it with no gaps or overlaps, counting to find the total number of square units, and describing the measurement using a number and the unit
Computational Fluency TEKS

Two-Digit Addition and Subtraction

  • 2.4B add up to four two-digit numbers and subtract two-digit numbers using mental strategies and algorithms based on knowledge of place value and properties of operations

Skip Counting – Coins

  • 2.5A determine the value of a collection of coins up to one dollar [pennies, nickels, and dimes only in this unit]
    • 2.5B use the cent symbol, dollar sign, and the decimal point to name the value of a collection of coins
Spiral Review TEKS

Measure Time

  • 2.9G read and write time to the nearest one-minute increment using analog and digital clocks and distinguish between a.m. and p.m.

Addition and Subtraction [Solving, Explaining, and Representing]

  • Solving
    • 2.4C solve one-step and multi-step word problems involving addition and subtraction within 1,000 [100 in this unit] using a variety of strategies based on place value, including algorithms [Re-introduce CGI problem types JSU, SSU]
      • 2.10C write and solve one-step word problems involving addition or subtraction using data represented within pictographs and bar graphs with intervals of one
  • Explaining
    • 2.1D communicate mathematical ideas, reasoning, and their implications using multiple representations, including symbols, diagrams, graphs, and language as appropriate
    • 2.1G display, explain, and justify mathematical ideas and arguments using precise mathematical language in written or oral communication
  • Representing
    • 2.4D generate and solve problem situations for a given mathematical number sentence involving addition and subtraction of whole numbers within 1,000 [100 in this unit]
    • 2.7C represent and solve addition and subtraction word problems where unknowns may be any one of the terms in the problem