Iowa Core K-12 Mathematics (PDF) - Green Hills AEA

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3. Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and
Mathematics | Grade 2 In Grade 2, instructional time should focus on four critical areas: (1) extending understanding of base-ten notation; (2) building fluency with addition and subtraction; (3) using standard units of measure; and (4) describing and analyzing shapes. (1) Students extend their understanding of the base-ten system. This includes ideas of counting in fives, tens, and multiples of hundreds, tens, and ones, as well as number relationships involving these units, including comparing. Students understand multi-digit numbers (up to 1000) written in base-ten notation, recognizing that the digits in each place represent amounts of thousands, hundreds, tens, or ones (e.g., 853 is 8 hundreds + 5tens + 3 ones). (2) Students use their understanding of addition to develop fluency with addition and subtraction within 100. They solve problems within 1000 by applying their understanding of models for addition and subtraction, and they develop, discuss, and use efficient, accurate, and generalizable methods to compute sums and differences of whole numbers in base-ten notation, using their understanding of place value and the properties of operations. They select and accurately apply methods that are appropriate for the context and the numbers involved to mentally calculate sums and differences for numbers with only tens or only hundreds. (3) Students recognize the need for standard units of measure (centimeter and inch) and they use rulers and other measurement tools with the understanding that linear measure involves an iteration of units. They recognize that the smaller the unit, the more iterations they need to cover a given length. (4) Students describe and analyze shapes by examining their sides and angles. Students investigate, describe, and reason about decomposing and combining shapes to make other shapes. Through building, drawing, and analyzing two- and three-dimensional shapes, students develop a foundation for understanding area, volume, congruence, similarity, and symmetry in later grades. Disclaimer: This document is up-to-date as of 11/17/2010. The language provided may not be Page 19 of 98 modified in any way. The most current Iowa Core can be found at http://iowacore.educateiowa.gov.
Page 1 and 2: Mathematics November 17, 2010
Page 3 and 4: Introduction Iowa Core Mathematics
Page 5 and 6: These Standards endeavor to follow
Page 7 and 8: How to read the grade level standar
Page 9 and 10: 4. Model with mathematics. Mathemat
Page 11 and 12: Mathematics | Kindergarten In Kinde
Page 13 and 14: Counting and Cardinality K.CC Know
Page 15 and 16: Mathematics | Grade 1 In Grade 1, i
Page 17: Operations and Algebraic Thinking 1
Page 21 and 22: Operations and Algebraic Thinking 2
Page 27 and 28: 2. Measure and estimate liquid volu
Page 33 and 34: Understand decimal notation for fra
Page 39 and 40: 7. Apply and extend previous unders
Page 43 and 44: Ratios and Proportional Relationshi
Page 45 and 46: Expressions and Equations 6.EE Appl
Page 49 and 50: Ratios and Proportional Relationshi
Page 51 and 52: Geometry 7.G Draw, construct, and d
Page 55 and 56: The Number System 8.NS Know that th
Page 57 and 58: 3. Describe the effect of dilations
Page 59 and 60: Mathematics | High School—Number
Page 61 and 62: The Real Number System N-RN Extend
Page 63 and 64: Mathematics | High School—Algebra
Page 65 and 66: Seeing Structure in Expressions A-S
Page 67 and 68: 6. Solve systems of linear equation
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Functions Overview Interpreting Fun
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9. Compare properties of two functi
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Mathematics | High School—Modelin
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Mathematics | High School—Geometr
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Geometry Overview Congruence • Ex
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Similarity, Right Triangles, and Tr
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(IA) Use diagrams consisting of ver
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Statistics and Probability Overview
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4. Use data from a sample survey to
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Note on courses and transitions The
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First quartile. For a data set with
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Tape diagram. A drawing that looks
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Table 2. Common multiplication and
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Sample of Works Consulted Existing
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Schmidt, W., Houang, R., and Cogan,
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Iowa Core K-12 Mathematics (PDF) - Green Hills AEA

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