# Mathematics - Class II Resources

The following list of online resources are provided as a sample of curated resources. New resources shall be added as we come across interesting and relevant online materials.

#### 1. Counting Numbers

Description: This video shows how to count numbers till 1000 by skip counting by 2s, 3s, 5s, 10s, 20s, 50s and 100s.

Core Concepts: II-A1 counting beyond 100: Counting backward and forward.

#### 2. Skip Counting by 5s, 10s, and 100s

Description: This video shows how to skip count by 5s, 10s and 100.

Core Concepts: II-A1 counting beyond 100: Counting backward and forward.

Link: Video on skip counting by 5s, 10s, and 100s - 2nd grade math (2.NBT.2)

#### 3. Counting in 2s, 5s and 10s

Description: This video shows how to skip count by 5s, 10s on a number line.

Core Concepts: II-A1 counting beyond 100: Counting backward and forward.

Link: Video on counting in 2s 5s and 10s

#### 4. What is Place Value? (Part 1)

Description: This video shows how to represent 2-digit numbers using base ten blocks and on place value chart. It contains an explanation of what each digit in a number is worth, by where it is placed.

Core Concepts: II-A4 represent 3-digit whole numbers: Using base-ten blocks, using place value charts.

Link: Video on what is place value?

#### 5. Math Antics - Place Value

Description: This video contains explanation of how the ten digits represent different amounts based on the number place (place value), and groups of ten (pattern of place value).

Core Concepts: II-B5 place value patterns.

Link: Unable to play the video

#### 6. Place Value - Using Hundreds, Tens, and Ones

Description: This video shows how to represent 3-digit numbers using base-ten blocks and place value chart.

Core Concepts: II-B5 place value patterns.

Link: Video on place value - using hundreds, tens, and ones

#### 7. Comparing Large Numbers - Greater Than, Less Than, and Equal - 2nd Grade Math (2.NBT.4)

Description: This video shows how to compare large numbers by comparing each place value starting from the leftmost digit.

Core Concepts: II-A5 comparing 3-digit whole numbers.

Link: Video on comparing large numbers - greater than, less than, and equal - 2nd grade math (2.NBT.4)

Description: This video contains an explanation of commutative and associative properties of addition.

Core Concepts: II-A8 properties of addition: Commutative and associative.

#### 9. What is a Benchmark?

Description: This video shows how to use benchmarks to estimate sums.

Core Concepts: II-A9 addition strategies: Sums till 100.

#### 10. Using Doubles Facts to Add

Description: This video shows how to use double facts to add.

Core Concepts: II-A9 addition strategies: Sums till 100.

#### 11. Make Ten Strategy

Description: This video explains how to use ‘facts for 10’ strategy to add.

Core Concepts: II-A9 addition strategies: Sums till 100.

Link: Video on make ten strategy

#### 12. Double-Digit Addition for Kids

Description: This video shows how to add 2-digit numbers using digit placement.

Core Concepts: II-A9 addition strategies: Sums till 100.

#### 13. Use Doubles to Subtract

Description: This video shows how to use doubles facts to subtract numbers from 2-digit numbers.

Core Concepts: II-A10 subtraction strategies: 1-digit numbers from 2-digit numbers and 2-digit numbers from 2-digit numbers.

LinkVideo on using doubles to subtract

#### 14. Using Bench Mark Numbers to Subtract

Description: This video contains an explanation of benchmarks and how to use bench numbers to subtract numbers from 2-digit numbers.

Core Concepts: II-A10 subtraction strategies: 1-digit numbers from 2-digit numbers and 2-digit numbers from 2-digit numbers.

#### 15. Make a 10 to Subtract

Description: This video shows how to use facts of 10 to subtract numbers from 2-digit numbers.

Core Concepts: II-A10 subtraction strategies: 1-digit numbers from 2-digit numbers and 2-digit numbers from 2-digit numbers.

Link: Video on make a 10 to subtract

#### 16. Double-Digit Subtraction for Kids

Description: This video shows how to subtract 2-digit numbers using digit placement (tens and ones).

Core Concepts: II-A10 subtraction strategies: 1-digit numbers from 2-digit numbers and 2-digit numbers from 2-digit numbers.

Link: Video on double-digit subtraction for kids

#### 17. Addition and Subtraction Fact Families | Easy Teaching

Description: This video explains how to use addition and subtraction fact family to solve addition and subtraction problems.

Core Concepts: II-A11 addition and subtraction facts: Represent addition and subtraction, fact, relation of addition and subtraction. II-B3 finding patterns using addition tables and II-B4 open sentences: Simple patterns in addition and subtraction.

#### 18. Even and Odd Numbers

Description: This video explains even and odd numbers.

Core Concepts: II-B1 even & odd numbers: Even numbers as doubles.

Link: Video on even and odd numbers

#### 19. Patterns

Description: This video explains repeating, growing and shrinking patterns.

Core Concepts: II- B2 compare number patterns.

#### 20. Units of Length - Centimeter

Description: This video explains what centimeter is and how to measure lengths using centimeter.

Core Concepts: II-C1 measuring length: Measuring length using non-standard units, measuring length using meter and centimeter.

Link: Video on units of length-centimeter

#### 21. Measuring Length in Centimeter

Description: This video demonstrates measuring lengths of small objects using centimeter.

Core Concepts: II-C1 measuring Length: measuring length using non-standard units, measuring length using meter and centimeter.

Link: Video on measuring length in centimeters

#### 22. Units of Length - Meter

Description: This video explains what meter is and demonstrates how to measure lengths using meter.

Core Concepts: II-C1 measuring length: measuring length using non-standard units, measuring length using meter and centimeter.

Link: Video on units of length-meter

#### 23. Measuring Length in Meters

Description: This video demonstrates measuring lengths of large objects using meter.

Core Concepts: II-C1 measuring length: measuring length using non-standard units, measuring length using meter and centimeter.

Link: Video on measuring length in meters

#### 24. Area and Perimeter

Description: This video contains an explanation measuring area using both standard and non-standard units.

Core Concepts: II-C4 estimate and measure area: Comparing area directly & indirectly, measuring area using non-standard units, measuring perimeter in centimeter.

Link: Video on area and perimeter

#### 25. 2D Shapes & Polygons

Description: This video contains explanations on 2-D shapes and their attributes.

Core Concepts: II-D2 2D & 3D shapes: sorting, naming 2D and 3D shapes.

Link: Video on 2D shapes & polygons

#### 26. Exploring 3D Shapes

Description: This video contains explanations on 3-D shapes and their attributes.

Core Concepts: II-D2 2D & 3D shapes: Sorting, naming 2D and 3D shapes.

Link: Video on exploring 3D shapes

#### 27. Data Collection

Description: This video contains an explanation on how to collect and organize data, interpret and create a pictograph, interpret and create bar graphs.

Core Concepts: II-E1 collect & organize data, II-E2 pictographs: interpret pictographs, create pictographs,  II-E3 bar graphs: interpret and create bar graphs. 