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# 2nd Grade Common Core Resources

These tasks are grade-level formative performance assessment tasks aligned to the Common Core State Standards for Mathematics. Some have accompanying scoring rubrics and discussion of student work samples. Others, such as the Dana Center Early Mathematics Tasks, connect to children’s literature.

You may download and use these tasks for professional development purposes without modifying the tasks.

Quick reference: What are these tools?

## Operations and Algebraic Thinking (OA)

• 2.OA.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.

Dana Center Early Math Tasks
Problems of the Month
• 2.OA.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.

Problems of the Month
Performance Assessment Tasks
Dana Center Early Math Tasks
• 2.OA.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.

Problems of the Month
Performance Assessment Tasks
• 2.OA.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.

Problems of the Month
Dana Center Early Math Tasks

## Number and Operations in Base Ten (NBT)

• 2.NBT.1

Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones

Problems of the Month
Performance Assessment Tasks
Dana Center Early Math Tasks
• 2.NBT.3

Read and write numbers to 1000 using base-ten numerals, number names, and expanded form.

Dana Center Early Math Tasks
• 2.NBT.4

Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of compariso

Problems of the Month
Performance Assessment Tasks
Dana Center Early Math Tasks
• 2.NBT.5

Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction

Problems of the Month
Performance Assessment Tasks
Dana Center Early Math Tasks
• 2.NBT.6

Add up to four two-digit numbers using strategies based on place value and properties of operations.

Problems of the Month
Performance Assessment Tasks
• 2.NBT.7

Add and subtract within 1000, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method.

Performance Assessment Tasks
• 2.NBT.8

Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900.

Dana Center Early Math Tasks
• 2.NBT.9

Explain why addition and subtraction strategies work, using place value and the properties of operations.

Dana Center Early Math Tasks

## Measurement and Data (MD)

• 2.MD.1

Measure the length of an object by selecting and using appropriate tools such as rulers, yardsticks, meter sticks, and measuring tapes.

Problems of the Month
• 2.MD.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.

Performance Assessment Tasks
• 2.MD.4

Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard length unit.

Problems of the Month
• 2.MD.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.

Dana Center Early Math Tasks

## Geometry (G)

• 2.G.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.

Problems of the Month
Performance Assessment Tasks
• 2.G.2

Partition a rectangle into rows and columns of same-size squares and count to find the total number of them.

Problems of the Month
Performance Assessment Tasks
• 2.G.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.

Problems of the Month
Performance Assessment Tasks