The K-5 standards provide students with a solid foundation in whole numbers, addition, subtraction, multiplication, division, fractions and decimals—which help young students build the foundation to successfully apply more demanding math concepts and procedures, and move into applications.
The middle school standards are robust and provide a coherent and rich preparation for high school mathematics.
The high school standards call on students to practice applying mathematical ways of thinking to real world issues and challenges; they prepare students to think and reason mathematically.
Source: Common Core State Standards Initiative, Key Points in Mathematics
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