# Common Core Mapping for 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
(4) describing and analyzing shapes.

Related Topics:
Common Core for Mathematics
Common Core Lesson Plans and Worksheets

### Operations and Algebraic Thinking

 Code Standard Lessons Worksheets Games 2.OA.A.1 Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem. Word Problems 2.OA.B.2 Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers. Mental Strategies 2.OA.C.3 Determine whether a group of objects (up to 20) has an odd or even number of members, e.g., by pairing objects or counting them by 2s; write an equation to express an even number as a sum of two equal addends. Odd and Even Odd and Even Odd and Even 2.OA.C.4 Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns; write an equation to express the total as a sum of equal addends. Addition Arrays Create Equal Groups

### Measurement and Data

 Code Standard Lessons Worksheets Games 2.MD.A.1 Measure the length of an object by selecting and using appropriate tools such as rulers, yardsticks, meter sticks, and measuring tapes. Measure Lengths Measurement 2.MD.A.2 Measure the length of an object twice, using length units of different lengths for the two measurements; describe how the two measurements relate to the size of the unit chosen. Units of Lengths Measurement 2.MD.A.3 Estimate lengths using units of inches, feet, centimeters, and meters. Estimate Lengths Estimate Estimation 2.MD.A.4 Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard length unit. Comparing lengths 2.MD.B.5 Use addition and subtraction within 100 to solve word problems involving lengths that are given in the same units, e.g., by using drawings (such as drawings of rulers) and equations with a symbol for the unknown number to represent the problem. Word Problems 2.MD.B.6 Represent whole numbers as lengths from 0 on a number line diagram with equally spaced points corresponding to the numbers 0, 1, 2, ..., and represent whole-number sums and differences within 100 on a number line diagram. Number line Line Jumper 2.MD.C.7 Tell and write time from analog and digital clocks to the nearest five minutes, using a.m. and p.m. Tell Time Time Games 2.MD.C.8 Solve word problems involving dollar bills, quarters, dimes, nickels, and pennies, using \$ and ¢ symbols appropriately. Example: If you have 2 dimes and 3 pennies, how many cents do you have? Count Money Money Games 2.MD.D.9 Generate measurement data by measuring lengths of several objects to the nearest whole unit, or by making repeated measurements of the same object. Show the measurements by making a line plot, where the horizontal scale is marked off in whole-number units. Line Plots Line Plots 2.MD.D.10 Draw a picture graph and a bar graph (with single-unit scale) to represent a data set with up to four categories. Solve simple put-together, take-apart, and compare problems using information presented in a bar graph. Picture Graphs and Bar Graphs Graphs

### Geometry

 Code Standard Lessons Worksheets Games 2.G.A.1 Recognize and draw shapes having specified attributes, such as a given number of angles or a given number of equal faces. Identify triangles, quadrilaterals, pentagons, hexagons, and cubes. Identify & draw shapes Shapes 2.G.A.2 Partition a rectangle into rows and columns of same-size squares and count to find the total number of them. Partition Rectangles 2.G.A.3 Partition circles and rectangles into two, three, or four equal shares, describe the shares using the words halves, thirds, half of, a third of, etc., and describe the whole as two halves, three thirds, four fourths. Recognize that equal shares of identical wholes need not have the same shape. Partition Kids & Cookies

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