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• Math: Enriching Geometry Understanding and Introducing Measuring Area

# Math: Enriching Geometry Understanding and Introducing Measuring 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
##### Numeracy TEKS

Counting Patterns (Suggested: 3 days)

• 2.5A determine the value of a collection of coins up to one dollar [pennies, nickels, dimes, and quarters]
• 2.5B use the cent symbol, dollar sign, and the decimal point to name the value of a collection of coins

Building Fluency with Adding and Subtracting within 20 (Suggested: 3 days)

• 2.4A recall basic facts to add and subtract within 20 with automaticity

Developing Strategies for Adding and Subtracting 2-Digit Numbers (Suggested: 9 days)

• 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
##### Spiral Review TEKS

Creating, Solving, and Representing Story Problems (Suggested: 15 days)

• Computation
• 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
• Problem Solving
• 2.4C solve one-step and multi-step word problems involving addition and subtraction within 1,000 [120 in this unit] using a variety of strategies based on place value, including algorithms
• 2.4D generate and solve problem situations for a given mathematical number sentence involving addition and subtraction of whole numbers within 1,000 [120 in this unit].
• 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
• Representing
• 2.7C represent and solve addition and subtraction word problems where unknowns may be any one of the terms in the problem

Counting Quantities (Suggested: 2 days, using both numeracy and spiral review time)

• RRISD 2.1 organize and count a collection of objects and create a recording of how the objects were counted
• 2.1C  select tools, including real objects, manipulatives, paper and pencil, and technology as appropriate, and techniques, including mental math, estimation, and number sense as appropriate, to solve problems;
• 2.1E  create and use representations to organize, record, and communicate mathematical ideas;
• Counting Coins (Make this the focus on 1 day of Counting Collections)

• 2.5A determine the value of a collection of coins up to one dollar
• 2.5B use the cent symbol, dollar sign, and the decimal point to name the value of a collection of coins

Telling Time (Ongoing)

• 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.