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2.1
Patterns
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2.1.1
Describe, extend, and create patterns using symbols, shapes or designs (e.g., repeating and growing patterns made up of sets of shapes or designs, create patterns by combining different shapes and taking them apart).
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2.1.2
Formulate and record generalizations about number patterns in a variety of situations (e.g., addition and subtraction patterns, build a table showing the cost of one pencil at 10 cents, 2 pencils at 20 cents)
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2.2
Number Sense
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2.2.1
Place Value
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2.2.1.a
Use concrete models of hundreds, tens, and ones to develop the concepts of place value.
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2.2.1.b
Demonstrate (using concrete objects, pictures, and numerical symbols) fractional parts including halves, thirds, and fourths.
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2.2.2
Reading and Writing Numbers
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2.2.2.a
Link place value concepts to the reading and writing of numbers (e.g., base-10 blocks).
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2.2.2.b
Represent a number in a variety of ways (e.g., write the calendar day in different ways, write 15 as 8 + 7, write 25 as 2 tens + 5 ones or as 1 ten + 15 ones).
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2.2.2.c
Write a number sentence to compare numbers less than 100 (e.g., 5 is more than 2, 3 is less than 7, page 51 comes after 50, and 51 is between 50 and 60).
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2.2.3
Develop and use strategies of estimation (e.g., compose, decompose and regroup numbers, use knowledge of 10 to estimate quantities and sums [two numbers less than 10 can not add up to more than 20], use body parts to estimate measurements).
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2.2.4
Determine whether a number is odd or even.
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2.3
Number Operations and Computation
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2.3.1
Develop and apply the concepts of addition and subtraction.
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2.3.1.a
Demonstrate fluency with basic addition and subtraction facts and fact families to 18.
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2.3.1.b
Solve two-digit addition and subtraction problems with and without regrouping using a variety of techniques (e.g., concrete, paper and pencil, mental math).
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2.3.1.c
Develop operation sense by applying the associative property of addition (e.g., 3 + (2 + 1) = (3 + 2) + 1).
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2.3.1.d
Describe the relationship between addition and subtraction (e.g., addition and subtraction are inverse operations).
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2.3.2
Use mental strategies (or decomposition strategies) for addition and subtraction (e.g., make a group of 10 objects and 2 objects from a group of 7 objects and 5 objects).
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2.3.3
Complete addition number sentences with a missing addend and use to solve everyday problems.
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2.4
Geometry and Measurement
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2.4.1
Geometric Properties and Relationships
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2.4.1.a
Sort and classify symmetric and congruent figures.
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2.4.1.b
Identify two-dimensional geometric shapes in everyday situations (e.g., a stop sign is an octagon).
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2.4.2
Measurement
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2.4.2.a
Measure objects with nonstandard and standard units (e.g., use a human foot [nonstandard] then a ruler [standard] to measure length to the nearest inch).
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2.4.2.b
Select and use appropriate units of measurement in problem solving and everyday situations.
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2.4.3
Time and Money
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2.4.3.a
Tell time on digital and analog clocks to the quarter-hour.
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2.4.3.b
Identify and count money; connect coins and bills with place value.
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2.5
Data Analysis
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2.5.1
Collect, sort, organize, and display data in charts, bar graphs, and tables (e.g., collect data on teeth lost and display results in a chart).
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2.5.2
Summarize and interpret data in charts, bar graphs, and tables.
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2.5.3
Make predictions and estimates to describe data (e.g., predict what data on teeth lost might look like for younger children and/or older children).
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