1


Big Idea 1  Numbers Through 10


Big Idea 2  Patterns with Partners through 10


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2


Big Idea 1  Represent Addition Situations


Big Idea 2  Solve Addition Equations


Big Idea 3  Solve Subtraction Equations


Big Idea 4  Equation Exploration


3


Big Idea 1  Counting On with Addition Situations














Big Idea 2  Counting On with Subtraction Situations


Big Idea 3  Mixed Story Problems


4


Big Idea 1  Tens and Teens






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Big Idea 2  Place Value to 100


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Big Idea 3  Addition Strategies


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5


Big Idea 1  Teen Solution Methods


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Big Idea 2  Find Patterns and Relationships


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6


Big Idea 1  Represent and Compare Data






Big Idea 2  Compare Problem Types


7


Big Idea 1  Tell and Write Time


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Big Idea 2  Shapes and Equal Shares


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Big Idea 3  Measure and Order by Length


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8


Big Idea  Add 2Digit Numbers


This document includes the IXL® skill alignments to Houghton Mifflin Harcourt's Math Expressions 2013 Common Core curriculum. IXL provides skill alignments as a service to teachers, students, and parents. The skill alignments are provided by IXL and are not affiliated with, sponsored by, reviewed, approved or endorsed by Houghton Mifflin Harcourt or any other third party. IXL® and IXL Learning® are registered trademarks of IXL Learning, Inc. All other intellectual property rights (e.g., unregistered and registered trademarks and copyrights) are the property of their respective owners.