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2 - MATH
MATHEMATICS
Operations and Algebraic Thinking 2.OA
A. Represent and solve problems involving addition and subtraction.
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.
Student Video - Another Look for Lesson 1-9 Solve Addition and Subtraction Word Problems
Listen and Look Video explaining overview for Lesson 3-8 Solve One-Step and Two-Step Problems
Student Video - Another Look for Lesson 3-8 Solve One-Step and Two-Step Problems
Listen and Look Video explaining overview for Lesson 4-7 Solve One-Step and Two-Step Problems
Student Video - Another Look for Lesson 4-7 Solve One-Step and Two-Step Problems
Listen and Look Video explaining overview for Lesson 5-8 Solve One-Step and Two-Step Problems
Student Video - Another Look for Lesson 5-8 Solve One-Step and Two-Step Problems
Listen and Look Video explaining overview for Lesson 6-8 Solve One-Step and Two-Step Problems
Student Video - Another Look for Lesson 6-8 Solve One-Step and Two-Step Problems
Listen and Look Video explaining overview for Lesson 7-1 Represent Addition and Subtraction Problems
Student Video - Another Look for Lesson 7-1 Represent Addition and Subtraction Problems
Student Video - Another Look for Lesson 7-2 Mixed Practice: Solve Addition and Subtraction Problems
Student Video - Another Look for Lesson 7-3 Continue Practice with Addition and Subtraction Problems
Listen and Look Video explaining overview for Lesson 7-4 Solve Two-Step Problems
Student Video - Another Look for Lesson 7-4 Solve Two-Step Problems
Listen and Look Video explaining overview for Lesson 7-5 Continue to Solve Two-Step Problems
Student Video - Another Look for Lesson 7-5 Continue to Solve Two-Step Problems
Listen and Look Video explaining overview for Lesson 7-6 Math Practices & Problem Solving: Reasoning
Student Video - Another Look for Lesson 7-6 Math Practices & Problem Solving: Reasoning
B. Add and subtract within 20.
2. Fluently add and subtract within 20 using mental strategies.By end of grade 2, know from memory all sums of two single-digit numbers and related differences.
Listen and Look Video explaining overview for Lesson 1-1 Addition Fact Strategies
Student Video - Another Look for Lesson 1-1 Addition Fact Strategies
Listen and Look Video explaining overview for Lesson 1-2 Doubles and Near Doubles
Student Video - Another Look for Lesson 1-2 Doubles and Near Doubles
Listen and Look Video explaining overview for Lesson 1-3 Make a 10 to Add
Student Video - Another Look for Lesson 1-3 Make a 10 to Add
Listen and Look Video explaining overview for Lesson 1-4 Addition Fact Patterns
Student Video - Another Look for Lesson 1-4 Addition Fact Patterns
Listen and Look Video explaining overview for Lesson 1-5 Count On and Count Back to Subtract
Student Video - Another Look for Lesson 1-5 Count On and Count Back to Subtract
Listen and Look Video explaining overview for Lesson 1-6 Think Addition to Subtract
Student Video - Another Look for Lesson 1-6 Think Addition to Subtract
Listen and Look Video explaining overview for Lesson 1-7 Make a 10 to Subtract
Student Video - Another Look for Lesson 1-7 Make a 10 to Subtract
Listen and Look Video explaining overview for Lesson 1-8 Practice Addition and Subtraction Facts
Student Video - Another Look for Lesson 1-8 Practice Addition and Subtraction Facts
C. Work with equal groups of objects to gain foundations for multiplication.
4. Use addition to find the total number of objects arranged in rectangular arrays with up to five rows and up to five columns; write an equation to express the total as a sum of equal addends.
Listen and Look Video explaining overview for Lesson 2-3 Use Arrays to Find Totals
Student Video - Another Look for Lesson 2-3 Use Arrays to Find Totals
Listen and Look Video explaining overview for Lesson 2-4 Make Arrays to Find Totals
Student Video - Another Look for Lesson 2-4 Make Arrays to Find Totals
Number and Operations in Base Ten 2.NBT
A. Understand place value.
1. 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 as special cases:
Listen and Look Video explaining overview for Lesson 9-2 Models and 3-Digit Numbers
Student Video - Another Look for Lesson 9-2 Models and 3-Digit Numbers
Listen and Look Video explaining overview for Lesson 9-3 Name Place Values
Student Video - Another Look for Lesson 9-3 Name Place Values
a. 100 can be thought of as a bundle of ten tens—called a “hundred.”
Listen and Look Video explaining overview for Lesson 9-1 Understand Hundreds
Student Video - Another Look for Lesson 9-1 Understand Hundreds
b. 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).
2. Count within 1,000; skip-count by 5s, 10s, and 100s. Identify patterns in skip counting starting at any number.
Listen and Look Video explaining overview for Lesson 9-6 Place-Value Patterns with Numbers
Student Video - Another Look for Lesson 9-6 Place-Value Patterns with Numbers
Listen and Look Video explaining overview for Lesson 9-7 Skip Count by 5's, 10's, and 100's to 1,000
Student Video - Another Look for Lesson 9-7 Skip Count by 5's, 10's, and 100's to 1,000
3. Read and write numbers to 1,000 using base-ten numerals, number names, and expanded form.
Listen and Look Video explaining overview for Lesson 9-4 Read and Write 3-Digit Numbers
Student Video - Another Look for Lesson 9-4 Read and Write 3-Digit Numbers
Listen and Look Video explaining overview for Lesson 9-5 Different Ways to Name the Same Number
Student Video - Another Look for Lesson 9-5 Different Ways to Name the Same Number
B. Use place value understanding and properties of operations to add and subtract.
5. Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
Listen and Look Video explaining overview for Lesson 3-1 Add Tens and Ones on a Hundred Chart
Student Video - Another Look for Lesson 3-1 Add Tens and Ones on a Hundred Chart
Listen and Look Video explaining overview for Lesson 3-2 Add Tens on an Open Number Line
Student Video - Another Look for Lesson 3-2 Add Tens on an Open Number Line
Listen and Look Video explaining overview for Lesson 3-3 Add Tens and Ones on an Open Number Line
Student Video - Another Look for Lesson 3-3 Add Tens and Ones on an Open Number Line
Listen and Look Video explaining overview for Lesson 3-4 Break Apart Numbers to Add
Student Video - Another Look for Lesson 3-4 Break Apart Numbers to Add
Listen and Look Video explaining overview for Lesson 3-5 Continue to Break Apart Numbers to Add
Student Video - Another Look for Lesson 3-5 Continue to Break Apart Numbers to Add
Listen and Look Video explaining overview for Lesson 3-6 Add Using Compensation
Student Video - Another Look for Lesson 3-6 Add Using Compensation
Listen and Look Video explaining overview for Lesson 3-7 Practice Adding Using Strategies
Student Video - Another Look for Lesson 3-7 Practice Adding Using Strategies
Listen and Look Video explaining overview for Lesson 4-1 Add with Partial Sums
Student Video - Another Look for Lesson 4-1 Add with Partial Sums
Listen and Look Video explaining overview for Lesson 4-2 Continue to Add with Partial Sums
Student Video - Another Look for Lesson 4-2 Continue to Add with Partial Sums
Listen and Look Video explaining overview for Lesson 4-3 Models to Add 2-Digit Numbers
Student Video - Another Look for Lesson 4-3 Models to Add 2-Digit Numbers
Listen and Look Video explaining overview for Lesson 4-4 Add 2-Digit Numbers
Student Video - Another Look for Lesson 4-4 Add 2-Digit Numbers
Listen and Look Video explaining overview for Lesson 4-6 Practice Adding
Student Video - Another Look for Lesson 4-6 Practice Adding
Listen and Look Video explaining overview for Lesson 5-1 Subtract Tens and Ones on a Hundred Chart
Student Video - Another Look for Lesson 5-1 Subtract Tens and Ones on a Hundred Chart
Student Video - Another Look for Lesson 5-2 Count Back to Subtract on an Open Number Line
Student Video - Another Look for Lesson 5-4 Add Up to Subtract Using an Open Number Line
Listen and Look Video explaining overview for Lesson 5-5 Break Apart Numbers to Subtract
Student Video - Another Look for Lesson 5-5 Break Apart Numbers to Subtract
Listen and Look Video explaining overview for Lesson 5-6 Continue to Break Apart Numbers to Subtract
Student Video - Another Look for Lesson 5-6 Continue to Break Apart Numbers to Subtract
Listen and Look Video explaining overview for Lesson 5-7 Subtract Using Compensation
Student Video - Another Look for Lesson 5-7 Subtract Using Compensation
Listen and Look Video explaining overview for Lesson 6-1 Regroup 1 Ten for 10 Ones
Student Video - Another Look for Lesson 6-1 Regroup 1 Ten for 10 Ones
Student Video - Another Look for Lesson 6-2 Models to Subtract 2-Digit and 1-Digit Numbers
Listen and Look Video explaining overview for Lesson 6-3 Subtract 2-Digit and 1-Digit Numbers
Student Video - Another Look for Lesson 6-3 Subtract 2-Digit and 1-Digit Numbers
Listen and Look Video explaining overview for Lesson 6-4 Models to Subtract 2-Digit Numbers
Student Video - Another Look for Lesson 6-4 Models to Subtract 2-Digit Numbers
Listen and Look Video explaining overview for Lesson 6-5 Subtract 2-Digit Numbers
Student Video - Another Look for Lesson 6-5 Subtract 2-Digit Numbers
Listen and Look Video explaining overview for Lesson 6-6 Use Addition to Check Subtraction
Student Video - Another Look for Lesson 6-6 Use Addition to Check Subtraction
Listen and Look Video explaining overview for Lesson 6-7 Practice Subtracting
Student Video - Another Look for Lesson 6-7 Practice Subtracting
7. Add and subtract within 1,000, 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.
Listen and Look Video explaining overview for Lesson 10-2 Add on an Open Number Line
Student Video - Another Look for Lesson 10-2 Add on an Open Number Line
Listen and Look Video explaining overview for Lesson 10-3 Add Using Mental Math
Student Video - Another Look for Lesson 10-3 Add Using Mental Math
Listen and Look Video explaining overview for Lesson 10-4 Add Using Partial Sums
Student Video - Another Look for Lesson 10-4 Add Using Partial Sums
Listen and Look Video explaining overview for Lesson 10-5 Use Models to Add
Student Video - Another Look for Lesson 10-5 Use Models to Add
Student Video - Another Look for Lesson 11-2 Count Back to Subtract on an Open Number Line
Listen and Look Video explaining overview for Lesson 11-3 Add Up to Subtract on an Open Number Line
Student Video - Another Look for Lesson 11-3 Add Up to Subtract on an Open Number Line
Listen and Look Video explaining overview for Lesson 11-4 Subtract Using Mental Math
Student Video - Another Look for Lesson 11-4 Subtract Using Mental Math
Listen and Look Video explaining overview for Lesson 11-5 Use Models to Subtract
Student Video - Another Look for Lesson 11-5 Use Models to Subtract
Listen and Look Video explaining overview for Lesson 11-6: Explain Subtraction Strategies
Student Video - Another Look for Lesson 11-6 Explain Subtraction Strategies
9. Explain why addition and subtraction strategies work, using place value and the properties of operations.
Listen and Look Video explaining overview for Lesson 10-6 Explain Addition Strategies
Student Video - Another Look for Lesson 10-6 Explain Addition Strategies
Measurement and Data 2.MD
A. Measure and estimate lengths in standard units.
1. Measure the length of an object by selecting and using appropriate tools such as rulers, yardsticks, meter sticks, and measuring tapes.
Listen and Look Video explaining overview for Lesson 12-3 Inches, Feet, and Yards
Student Video - Another Look for Lesson 12-3 Inches, Feet, and Yards
Listen and Look Video explaining overview for Lesson 12-6 Centimeters and Meters
Student Video - Another Look for Lesson 12-6 Centimeters and Meters
B. Relate addition and subtraction to length.
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.
Listen and Look Video explaining overview for Lesson 13-1 Add and Subtract with Measurements
Student Video - Another Look for Lesson 13-1 Add and Subtract with Measurements
Listen and Look Video explaining overview for Lesson 13-2 Find Unknown Measurements
Student Video - Another Look for Lesson 13-2 Find Unknown Measurements
Listen and Look Video explaining overview for Lesson 13-3 Continue to Find Unknown Measurements
Student Video - Another Look for Lesson 13-3 Continue to Find Unknown Measurements
Geometry 2.G
A. Reason with shapes and their attributes.
1. Recognize and draw shapes having specified attributes, such as a given number of angles or a given number of equal faces.8 Identify triangles, squares, rectangles, rhombuses, trapezoids, pentagons, hexagons, and cubes.
Listen and Look Video explaining overview for Lesson 15-1 2-Dimensional Shapes
Student Video - Another Look for Lesson 15-1 2-Dimensional Shapes
Listen and Look Video explaining overview for Lesson 15-2 Polygons and Angles
Student Video - Another Look for Lesson 15-2 Polygons and Angles
Listen and Look Video explaining overview for Lesson 15-3 Draw 2-Dimensional Shapes
Student Video - Another Look for Lesson 15-3 Draw 2-Dimensional Shapes
Listen and Look Video explaining overview for Lesson 15-4 Cubes