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2nd grade
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Add and subtract within 20
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Add to count rectangular arrays
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Mentally add and subtract within 20
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Place value
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Place value with hundreds
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Convert between various representations, numbers within 1000
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Counting and skip-counting within 1000
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Intro to even and odd
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Compare three-digit numbers
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Add and subtract within 100
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Add and subtract within 100, abstract
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One-step word problems, add and subtract within 100
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Two-step word problems, add and subtract within 100
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Add and subtract within 1,000
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Add and subtract within 1,000
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Add multiple two-digit numbers
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Mentally add or subtract powers of ten
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Money and time
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Money word problems, including dollars
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Tell and write time, five minute increments
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Measurement
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Compare lengths by measuring
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Estimate lengths
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Add and subtract within 100 to solve word problems involving lengths
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Add and subtract within 100 on the number line
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Data
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Plot measurements on a line plot
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Draw picture and bar graphs
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Geometry
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Partition rectangles into rows and columns
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Area of a rectangle by counting unit squares
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Partition circles and rectangles into equal shares
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Draw shapes with certain attributes
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Intro to tessellations
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2nd grade
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Place value
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Compare three-digit numbers
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Other resources
Other resources: Practice
Khan Academy exercises
Compare 3-digit numbers
Khan Academy