# Mathematics - Class IV 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. Place Value

Description: This video link will help students understand what place value is and the place value of each digit of a number with the concept of money.

Core Concepts: Place value - definition and examples.

Description: This video will help students get the idea of what digit is and helps understand about the base 10 digits.

Core Concepts: Place value.

Description: This video explains the concept of how 5-digit numbers are created and how to place them in place value chart.

Core Concepts: 5 digit numbers.

Link: Video on Introducing 5-Digit Numbers

#### 2. Compare and Order Whole Numbers to 5-Digit

Description: This link is for the definition of whole numbers and a few examples.

Core Concepts: What is ‘whole number’?

Description: This link contains a video that explains how a number is written in expanded form and how they are compared using the place value chart.

Core Concepts: Comparing 5 digits number.

Description: This link contains a video that explains how two numbers with different digits can be compared in different situations.

Core Concepts: Comparing numbers with different digits.

Link: Video on Comparing and Ordering Numbers

#### 3. Modeling Mixed Numbers/Renaming Fractions

Description: This link contains the definition and how mixed numbers are formed.

Core Concepts: Definition of and concept of mixed numbers.

Description: This link contains a simulation and games to teach the concept of mixed numbers and how fractions can be converted to mixed numbers.

Core Concepts: Mixed numbers.

Description: This link is an interactive lesson on equivalent fraction. It will help students to understand more about equivalent fractions through games and the use of technology.

Core Concepts: Equivalent fractions.

Description: This link opens the interactive platform Geogebra to teach mixed numbers.

Core Concepts: Modeling mixed number division .

Description: This link contains a video that shows how fractions can be used in everyday lives.

Core Concepts: Use of fractions in everyday life.

Link: Video on What Are Some Ways We Use Fractions in Everyday Life?

#### 4. Compare and Order Fractions

Description: This link contains an activity and is an interactive lesson on Equivalent fraction. Comparing fractions with the same denominator.

Core Concepts: Comparing fractions.

Description: This link contains a video that explains how two fractions can be compared and ordered.

Core Concepts: Comparing and Ordering fractions.

Link: Video on Comparing and Ordering Fractions with Different Denominators

#### 5. Model and Record Hundredths

Description: This link will help students to understand the history of decimal and also the meaning of decima. It also has examples to solve.

Core Concepts: Details of decimals.

Description: This link contains an Introduction to hundredths on grid and on number line.

Core Concepts: Introduction of hundredths.

Link: Video on an Introduction to Hundredths

#### 6. Addition and Subtraction of Decimals and Wholes

Description: This link contains a video that demonstrates the step wise process of addition and subtracting decimals.

Core Concepts: Addition and subtraction of decimals.

Description: This link contains the steps for Addition and Subtraction of decimal numbers on number line and algorithm.

Core Concepts: Addition and subtraction of decimals using the number line.

#### 7. Multiplication

Description: This link contains what multiplication is and the concept of multiplication.

Core Concepts: Multiplication meanings.

Description: This clip will help students to compute multiplying 3-digit by 1-digit (with carrying).

Core Concepts: This clip will help students to compute multiplying 3-digit by 1-digit (with carrying).

Link: Multiplying: 3 digits times 1 digit

#### 8. Division

Description: This link contains the multiplication and division within 100 to solve word problems involving situations using arrays.

Core Concepts: Teaching Multiplication and Division Relationship Using Arrays.

Description: Slide on how the division is sharing equally. (Can download the slide for offline presentation).

Core Concepts: Division as sharing.

Description: Live worksheet to practice division.

Core Concepts: Division with regrouping in tens and ones.

Link: Webpage on Division with regrouping in tens and ones

#### 9. Add and Subtract Mentally

Description: This link is about mental maths and the use of mental maths in everyday life.

Core Concepts: What is mental health?

Description: This clip will help the students to add numbers mentally using different strategies.

Core Concepts: Addition and subtraction: Mental calculations.

#### 10. Mentally Multiply by 10 and 100

Description: This link contains the video to explain how mental maths works for 10 and 100.

Core Concepts: Multiplication of 10 and 100 mentally.

Description: This link contains video, quiz and a course on how to multiply mentally using 10 and 100.

Core Concepts: Multiplication of 10 and 100 mentally.

Link: Webpage on Multiplication of 10 and 100 mentally

#### 11. Open Frames as Numbers or Digits

Description: This link contains a presentation on open frames and number can be added to open frames.

Core Concepts: Number frames.

Description: This link contains an interactive lesson on finding the missing multipliers.

Core Concepts: Open frames.

#### 12. Apply Pattern to Solve Computation Problems

Description: This clip will help students to understand/ identify  the multiplication patterns using the multiplication table.

Core Concepts: Identifying patterns in multiplication.

Description: This link contains video, quiz and a course on how to apply patterns to clove computation problems.

Core Concepts: Using patterns to solve maths problems.

#### 13. Open Sentences and Computation Patterns

Description: This link contains video, quiz and a course on open and closed sentences in mathematical problems.

Core Concepts: Open and closed sentences.

Description: This clip is about open sentences and it will help students understand how to use open sentences with symbols and letters.

Core Concepts: Open and closed sentences.

#### 14. Multiplying by 10,100 and 1000

Description: This link contains videos that will help students to multiply a whole number by 10,100 and 1000.

Core Concepts: Multiplying by 10,100 and 1000.

Description: This link contains a video that explains how to multiply by 10, 100 and 1000.

Core Concepts: Multiplying by 10,100 and 1000.

Link: Video on Multiplying by 10,100 and 1000

#### 15. Estimate and Measure Lengths in mm,cm,m,km

Description: This link contains a video on how to estimate the length of a certain object;.

Core Concepts: Estimating lengths.

Description: This is a Pdf file that contains questions to revise the lessons on unit conversion.

Core Concepts: Unit conversion.

#### 16. Area

Description: This is a link that contains information about area with examples for the students.

Core Concepts: Area.

Description: This link contains hands-on experience on area and some game to understand the concept of area.

Core Concepts: Area.

#### 17. Volume

Description: This clip will help students to find volume by counting cubes.

Core Concepts: Measuring Volume by Counting Unit Cubes.

Link: Video on Measuring Volume by Counting Unit Cubes

#### 18. Triangle

Description: This clip will help students to know more about different triangles and help them to  classify triangles by angles and by sides.

Core Concepts: Triangle

Description: This link contains a video on the line of symmetry for triangles.

Core Concepts: Line of symmetry.

Link: Video on Line of symmetry

#### 19. Composite Shapes

Description: This clip will help students to understand more about composite shapes.

Core Concepts: Concept of composite shapes.

#### 20. Construct Models of Cones, Cylinders, Prisms and Pyramids

Description: This link contains an article on how each of the 3-D shapes are created from nets.

Core Concepts: Construct models from nets.

Description: This is a simulator to show the students how each of the nets become a 3-D shape.

Core Concepts: Nets of 3-D shapes.

Link: Webpage on Nets of 3-D shapes

#### 21. Slides, Flips and Turns (half, quarter)

Description: This link contains a video that explains the concept of slides, flips and turns.

Core Concepts: Slides, flips and turns.

Description: This link contains a video that explains the concept of slides, flips and turns by doing hands-on experiments.

Core Concepts: Slides, flips and turns.

Link: Video on Slides, flips and turns with experiments

Description: This link contains video and examples on how to find the reflective symmetry of different shapes.

Core Concepts: Reflective Symmetry

Description: This link contains a video that explains how reflective symmetry exists in our daily lives.

Core Concepts: Reflective Symmetry

Link: Video on how reflective symmetry exists in our daily lives.

#### 23. Congruence of Polygons

Description: This link contains a video on what congruent and non-congruent shapes are.

Core Concepts: Congruent and non-congruent polygons

Description: This clip will help students understand more about congruent shapes.

Core Concepts: Congruence of polygons

Link: Video on Congruence of polygons

#### 24. Angles

Description: This link contains a video on the different types of angles.

Core Concepts: Types of angles.

Link: Video on types of Angles

#### 25. Drawing Angles

Description: This link contains video on how to draw and measure angles using a protractor.

Core Concepts: Measuring and drawing angles.

#### 26. Collect, Organize and Describe Data

Description: This link contains an article the differences between Data and Information.

Core Concepts: Data and information

Description: This link contains a clip that will help students to understand more about collecting data.

Core Concepts: Data collection methods.

Link: Video on Data collection methods

#### 27. Construct and Interpret Pictographs and Bar Graphs

Description: This link contains a video on the concept of pictograph.

Core Concepts: Concept of pictograph

Description: This link contains a video to explain the concept of bar graphs for the beginners.

Core Concepts: Concept of bar graph.

Description: This link contains a video that shows how to interpret and read bar graphs and pictographs.

Core Concepts: Interpreting bar graphs and pictographs.

Link: Video on Interpreting bar graphs and pictographs

#### 28. Coordinate Grids (ordered pairs)

Description: This link contains a video that contains how to plot a point on the grid for the 1st quadrant.

Core Concepts: Coordinate grids (1st quadrant).

Description: This links contains a video on how ordered pairs are constructed on the coordinate grid.

Core Concepts: Ordered pairs.

Description: This link contains a video that shows the real life application of coordinate grids.

Core Concepts: Real life application of coordinate grids.

Link: Video on Real life application of coordinate grids

#### 29. Describing Probability Using fractions

Description: This link contains a video that shows the basics of probability.

Core Concepts: Basics of probability.

Description: This video shows how the probability can be calculated as fractions.

Core Concepts: Probability as fractions.

Link: Video on Probability as fractions