# 2nd Grade Common Core Math Resources

## Teacher Resources

### Units of Study

San Diego Unified School District (here's the District's CCSS website--lots of resources!)

Georgia Units: (even though the state has actually pulled out of CCSS, the resources they created are AMAZING!  Here's their math website.)

North Carolina Unit: (they have a great website for the Public Schools of North Carolina with lots of support resources.)

University of Texas Scope: (they have a great website called Mathematics Common Core Toolbox--check it out!)

EngageNY Second grade math resources.  This seems to be everyone's gold standard for CCSS materials.

Bridges in Mathematics: (the Bridges in Mathematics website)

This is cool:  math standards written in kid-friendly language: (From the Ontario-Montclair School District)
Second Grade Math Standards in Kid Friendly Language

Second Grade Flipbook (FlipBooks are meant to help teachers understand what each standard means in terms of what students must know and be able to do. They provide only a sample of instructional strategies and examples.)

Math Vocabulary from Granite School District in Utah

Compare the CCSS to the current state standards: (from Tulare County Office of Ed.  A great website for resources, too!)

Howard County Public School System Common Core Assessments.  VERY well designed assessments for each standard.  Check them out!

Videos explaining 2nd grade standards from Southeast Comprehensive Center.  Really interesting!

"I Can Statements" for each standard from Dr. Bobb Darnell on his website called Achievement Strategies, Inc.  Check them out!

Got any lessons, resources, websites that you want to share??  Add them to our Second Grade Math Dropbox!  Let's help each other out!!

Want to continue the dialogue?  Check out and add yourself as a member of this website's Facebook page here!!

### Activities and Lessons by Strand

(activities listed are from: Illustrative MathematicsInside Mathematics,  LearnZillion, Howard County Common Core Assessments)

#### Domain:  Operations and Algebraic Thinking 2.OA

Standard A (Represent and solve problems involving addition and subtraction):

A1 (Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of addition 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):

Apple Farm Field Trip

What's Missing? 10-1000 (go to page 181 of the PDF)
Modeling the Standard Algorithm for Double-Digit Addition (go to page 185 of the PDF, other activities, too!)

Video from LearnZillion:  Solve word problems by drawing bar models
Video from LearnZillion:  Write equations to solve word problems

Howard County assessment page with beautiful assessments of this standard, plus more!!

Standard B (Add and subtract within 20):

B2 (Fluently add and subtract within 20 using mental strategies.  By end of grade 2, know from memory all sums of two one-digit numbers):

Number Line Race to 10 (go to page 31 of the PDF, other activities, too!)
The Blue Square Game Parts 1 and 2 (go to page 53 of the PDF, other activities, too!)

Incredible Equations

Video from LearnZillion:  Add within 20 by regrouping on a ten frame
Video from LearnZillion:  Subtract within 20 using 10 frames

Howard County assessment page with beautiful assessments of this standard, plus more!!

Standard C (Work with equal groups of objects to gain foundations for multiplication):

C3 (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):

Howard County assessment page with beautiful assessments of this standard, plus more!!

C4 (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):

Howard County assessment page with beautiful assessments of this standard, plus more!!

#### Domain:  Number and Operations in Base Ten   2.NBT

Standard A (Understand place value):

A1 (Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g. 706 equals 7 hundreds, 0 tens, and 6 ones.  Understand the following speial cases):

Carol's Numbers

Video from LearnZillion:  Understand the value of a number

Howard County assessment page with beautiful assessments of this standard, plus more!!

A1a (100 can be thought of as a bundle of ten tens- called a "hundred"):

Hundreds of Seeds (go to page 73 of the PDF, other activities, too!)
52 Weeks, 365 Days (go to page 113 of the PDF)

Howard County assessment page with beautiful assessments of this standard, plus more!!

A1b (The numbers 100, 200, 300, 400, 500, 600, 700, 800, 900 refer to one, two, three, four, five, six, seven, eight, or nine hundreds-and 0 tens, and 0 ones):

Howard County assessment page with beautiful assessments of this standard, plus more!!

A2 (Count within 1000; skip-count by 5s, 10s, and 100s):

Pick Up Sticks (go to page 111 of the PDF, other activities, too!)
What's My Number? (go to page 167 of the PDF, other activities, too!)
Introducing the Open Number Line (go to page 185 of the PDF, other activities, too!)

Video from LearnZillion:  Count objects by 5s, 10s, and 100s
Video from LearnZillion:  Count money by 5s, 10s, and 100s
Video from LearnZillion:  Identify patterns when counting by 5s
Video from LearnZillion:  Identify patterns when counting by 10s
Video from LearnZillion:  Identify patterns when counting by 100s

Howard County assessment page with beautiful assessments of this standard, plus more!!

A3 (Read and write numbers to 1000 using base-ten numerals, number names, and expanded form):

Place Value Triple Roll (go to page 73 of the PDF, other activities, too!)
52 Weeks, 365 Days (go to page 113 of the PDF)
What's Missing? 10-1000 (go to page 167 of the PDF, other activities, too!)

Howard County assessment page with beautiful assessments of this standard, plus more!!

A4 (Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using  <, =, and > symbols to record the results of comparisons):

Target 700 (go to page 73 of the PDF, other activities, too!)
What's Missing? 10-1000 (go to page 167 of the PDF, other activities, too!)

Carol's Numbers

Howard County assessment page with beautiful assessments of this standard, plus more!!

Standard B (Use place value understanding and properties of operations to add and subtract):

B5 (Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction):

Modifying the Base Ten Bank (go to page 129 of the PDF)
What's Missing? 10-1000 (go to page 181 of the PDF)
Recording the Standard Algorithm for Double-Digit Addtion (go to page 185 of the PDF, other activities, too!)

Apple Farm Field Trip

Video from LearnZillion:  Add within 100 using base ten blocks
Video from LearnZillion:  Add within 100 on an open number line

Howard County assessment page with beautiful assessments of this standard, plus more!!

B6 (Add up to four two-digit numbers using strategies based on place value and properties of operations):

Howard County assessment page with beautiful assessments of this standard, plus more!!

B7 (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.  Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds):

Modifying the Base Ten Bank (go to page 129 of the PDF)

Peanuts and Ducks

Howard County assessment page with beautiful assessments of this standard, plus more!!

B8 (Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900):

Jump-a-Ten (go to page 111 of the PDF, other activities, too!)
Greatest Difference Wins (go to page 185 of the PDF, other activities, too!)

Howard County assessment page with beautiful assessments of this standard, plus more!!

B9 (Explain why addition and subtraction strategies work, using place value and the properties of operations):

Modifying the Base Ten Bank (go to page 129 of the PDF)
PJ Panda's Regrouping Method for Addtion  (go to page 185 of the PDF, other activities, too!)

Video from LearnZillion:  Explain addition using place value
Video from LearnZillion:  Explain addition by decomposing numbers
Video from LearnZillion:  Explain subtraction using place value

Howard County assessment page with beautiful assessments of this standard, plus more!!

#### Domain:  Measurement and Data   2.MD

Standard A (Measure and estimate lengths in standard units):

A1 (Measure the length of an object by selecting and using appropriate tools such as rulers, yardsticks, meter sticks, and measuring tapes):

Height and Length Problems (go to page 211 of the PDF)
Making Inchworm Rulers (go to page 255 of the PDF, other activities, too!)
How Long is an Army Ant? (go to page 295 of the PDF, other activities, too!)

Howard County assessment page with beautiful assessments of this standard, plus more!!

A2 (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):

Measuring Length in Teacher Feet (go to page 255 of the PDF, other activities, too!)

High Horse

Howard County assessment page with beautiful assessments of this standard, plus more!!

A3 (Estimate lengths using units of inches, feet, centimeters, and meters):

Measuring Length in Giant Feet (go to page 255 of the PDF, other activities, too!)
Estimate & Measure Centimeters (go to page 295 of the PDF, other activities, too!)

Howard County assessment page with beautiful assessments of this standard, plus more!!

A4 (Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard length unit):

Height and Length Problems (go to page 211 of the PDF)

Howard County assessment page with beautiful assessments of this standard, plus more!!

Standard B (Relate addition and subtraction to length):

B5 (Use addition and subtraction within 100 to solve word problems involving lengths that are given int he 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):

Recording the Standard Algorithm for Double-Digit Subtraction (go to page 185 of the PDF, other activities, too!)

Video from LearnZillion:  Solve length word problems using a ruler
Video from LearnZillion:  Find unknowns by creating number bonds

Howard County assessment page with beautiful assessments of this standard, plus more!!

B6 (Represent whole numbers as lengths from 0 on a number line diagram with equally spaced points corresponding tot he numbers 0, 1, 2, ..., and represent whole-number sums and differences within 100 on a number line diagram.

Number Line Race to Ten (go to page 31 of the PDF, other activities, too!)
Jump-a-Hundred (go to page 123 of the PDF)
What's My Number? (go to page 175 of the PDF)
Introducing the Open Number Line (go to page 185 of the PDF, other activities, too!)

Standard C (Work with time and money):

Video from LearnZillion:  Model numbers on a number line

Howard County assessment page with beautiful assessments of this standard, plus more!!

C7 (Tell and write time from analog and digital clocks to the nearest five minutes, using a.m. and p.m.):

Shake, Tell, & Record the Time (go to page 317 of the PDF, other activities, too!)
A.M. or P.M.? (go to page 317 of the PDF, other activities, too!)

Video from LearnZillion:  Distinguish between am and pm
Video from LearnZillion:  Read and record digital time
Video from LearnZillion:  Tell time using the hour hand

Howard County assessment page with beautiful assessments of this standard, plus more!!

C8 (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?) :

Dollar & Cents (go to page 147 of the PDF, other activities, too!)

Pocket Money

Video from LearnZillion:  Count money by drawing picture
Video from LearnZillion:  Add and subtract money using mental math
Video from LearnZillion:  Solve money problems by drawing pictures

Howard County assessment page with beautiful assessments of this standard, plus more!!

Standard D (Represent and interpret data):

D9 (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):

Howard County assessment page with beautiful assessments of this standard, plus more!!

D10 (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):

Our Pets

Video from LearnZillion:  Identify parts of picture graphs
Video from LearnZillion:  Create picture graphs
Video from LearnZillion:  Compare picture graphs and bar graphs

Howard County assessment page with beautiful assessments of this standard, plus more!!

#### Domain:  Geometry   2.G

Standard A (Reason with shapes and their attributes):

A1 (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):

Don's Shapes

Video from LearnZillion:  Draw a triangle
Video from LearnZillion:  Draw a quadrilateral
Video from LearnZillion:  Draw a pentagon
Video from LearnZillion:  Draw a hexagon

Howard County assessment page with beautiful assessments of this standard, plus more!!

A2 (Partition a rectangle into rows and columns of same-size squares and count to find the total number of them):

Howard County assessment page with beautiful assessments of this standard, plus more!!

A3 (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):