Common+Core+Math+Resources

__Mathematics - Grade 1: Introduction __ [|Mr. B's Fancy Common Core Page] In Grade 1, instructional time should focus on four critical areas: (1) developing understanding of addition, subtraction, and strategies for **addition and subtraction within 20**; (2) developing understanding of whole number relationships and **place value, including grouping in tens and ones;** (3) developing understanding of **linear** **measurement** and measuring lengths as iterating length units; and (4) reasoning about attributes of, and composing and decomposing geometric shapes.
 * A very thorough resource for exploring the new common core math standards

Mathematical Practices 1. Make sense of problems and persevere in solving 4. Model with mathematics. them. 5. Use appropriate tools strategically. 2. Reason abstractly and quantitatively. 6. Attend to precision. 3. Construct viable arguments and critique the reasoning 7. Look for and make use of structure. of others. 8. Look for and express regularity in repeated reasoning.

• Represent and solve problems involving addition and subtraction. • Understand and apply properties of operations and the relationship between addition and subtraction. • Add and subtract within 20. • Work with addition and subtraction equations.
 * Operations and Algebraic Thinking**

• Extend the counting sequence. • Understand place value. • Use place value understanding and properties of operations to add and subtract.
 * Number and Operations in Base Ten**

• Measure lengths indirectly and by iterating length units. • Tell and write time. • Represent and interpret data.
 * Measurement and Data**

• Reason with shapes and their attributes.
 * Geometry**