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• Math: Introducing Non-Standard Units of Length and Standard Units of Time

# Math: Introducing Non-Standard Units of Length and Standard Units of Time

### Suggested Time Frame: 13 Instructional Days

##### Focus TEKS

Measuring Length

• 1.7D  Describe a length to the nearest whole unit using a number and a unit
• 1.7A  Use [non-standard] measuring tools to measure the length of objects to reinforce the continuous nature of linear measurement
• 1.7B  Illustrate that the length of an object is the number of same-size units of length that, when laid end-to-end with no gaps or overlaps, reach from one end of the object to the other
• 1.7C  Measure the same object/distance with units of two different lengths and describe how and why the measurements differ

• 1.3B  Use objects and pictorial models to solve [length] word problems involving joining, separating, and comparing sets within 20 and unknowns as any one of the terms in the problem such as 2 + 4 =___; 3 +___= 7; and 5 =___– 3

Measuring Time

• 1.7E  Tell time to the hour and half hour using analog and digital clocks
##### Numeracy TEKS

Counting Patterns

• 1.5A Recite numbers forward and backward from any given number between 1 and 120 [80 in this unit]

• 1.3D Apply basic fact strategies to add and subtract within 20, including making 10 and decomposing a number leading to a 10 [Count On addition fact strategy in this unit]
##### Spiral Review TEKS

Addition and Subtraction [Solving, Explaining, and Representing]

• Solving
• 1.3B Use objects and pictorial models to solve word problems involving joining, separating, and comparing sets within 20 and unknowns as any one of the terms in the problem such as 2 + 4 =___; 3 +___= 7; and 5 =___– 3 [Focus on CGI problem types JRU, SRU, and PPW-WU; include problems about data and length as well]
• Explaining
• 1.3E Explain strategies used to solve addition and subtraction problems up to 20 using spoken words, objects, pictorial models, and number sentences
• Representing
• 1.3F Generate and solve problem situations when given a number sentence involving addition or subtraction of numbers within 20
• 1.5D Represent word problems involving addition and subtraction of whole numbers up to 20 using concrete and pictorial models and number sentences

Counting Collections

• 1.5A Apply number patterns within properties of numbers and operations in order to describe relationships. Recite numbers forward and backward from any given number between 1 and 120 [80 in this unit]