**1. Laws of Exponents**

**Description:** The given link has explained the laws of exponents in a simple way.

**Core Concepts:** IX-A1 Laws of exponent.

**Links:**

**2. Fractional Exponents**

**Description:** This web link explains the relation of fractional exponents with the root form.

**Core Concepts:** IX-A1 Fractional exponents.

**3. Rational and Irrational Numbers**

**Description:** Introduction on rational and irrational numbers.

**Core Concepts:** IX-A2 Rational and irrational numbers.

**4. Approximating the Values of Irrational Numbers**

**Description:** Placing the irrational numbers on the number line.

**Core Concepts:** IX-A2 Plotting rational and irrational numbers on the number line.

**Link:** Video on approximating the values of irrational numbers

**5. Online Number line Simulation**

**Description:** Placing the irrational numbers on the number line.

**Core Concepts:** IX-A2 Plotting rational and irrational numbers on the number line.

**Link:** Website on number line

**6. Number System**

**Description:** Pdf. file on number system to connect the rational and irrational numbers with real numbers.

**Core Concepts:** IX-A2 Concept on real numbers.

**Link:** PDF on number system

**7. Introduction to Sets**

**Description:** This web link explains about sets in a simple way.

**Core Concepts:** IX-A3 Definition of sets.

**8. Types of Sets**

**Description:** This web link talks about the types of sets.

**Core Concepts:** IX-A3 Types of sets.

**9. Sets and Venn Diagram**

**Description:** This web link describes about types of sets and representing each set with Venn diagram.

**Core Concepts:** IX-A3 Venn diagram.

**10. Set Operations**

**Description:** This link explains operations on sets such as intersection, union, and complimentary.

**Core Concepts:** IX-A3 Operations on sets.

**Link: **Video on set operations

**11. Income, Expenditure and Budget**

**Description:** The link contains a video on how to plan your personal budget.

**Core Concepts:** IX-A4 Household finance.

**Link:** Video on a simple Japanese money trick to become 35% richer

**12. Simple Interest**

**Description:** The link contains a video which can help to introduce simple interests.

**Core Concepts: **IX-A4 Simple interest.

**12. Simple Interest**

**Description:** The link contains concepts on definition of polynomials, degree of polynomial, terms and types of polynomials (monomial, binomial and trinomial).

**Core Concepts: **IX-B1 Polynomials.

**Link:** Website on polynomial

**14. Add and Subtract Polynomials**

**Description:** The link contains a video tutorial on addition and subtraction of polynomials pictorially and symbolically.

**Core Concepts: **IX-B1 Add and subtract polynomials.

**15. Pattern and Relation**

**Description:** Pictorial and table pattern worksheet.

**Core Concepts: **IX-B2 Pattern and relation.

**Link:** Document on pictorial and table patterns

**Description:** Pattern Rule worksheet.

**Core Concepts: **IX-B2 Pattern and relation.

**Link:** Document on pattern worksheet

**Description:** Video lesson on identifying the function from the table of values.

**Core Concepts: **IX-B2 Types of relation.

**16. Scatter Plot**

**Description:** Creating scatter plot using table of values.

**Core Concepts: **X-B2 Scatter plot.

**Link:** Website on scatter plots

**17. Algebra Basics: Solving Basic Linear Equations**

**Description:** This video explains about the meaning of linear equations and balancing the equations on both sides.

**Core Concepts: **IX-B3 Linear equations.

**Link:** Video on algebra basics

**18. Solving Linear Equations Using Inverse Operations**

**Description:** This link contains are PDF file with steps of solving a linear equations using an inverse operation.

**Core Concepts: **IX-B3 Linear equations.

**19. Algebra: Solving Linear Equations**

**Description:** This video demonstrates solving linear equations using inverse operations.

**Core Concepts: **IX-B3 Solving linear equations.

**Links:**

**20. Multi-Step Inequalities**

**Description:** This weblink contains a video that teaches how to solve linear inequalities in stepwise.

**Core Concepts: **IX-B3 Solving linear inequalities.

**21. Solving Linear inequalities**

**Description:** This weblink contains a video that teaches how to solve linear inequalities in stepwise.

**Core Concepts: **IX-B3 Solving linear inequalities.

**22. Precision of the instrument**

**Description:** This web link contains a video on understanding the concept of precision with examples.

**Core Concepts: **IX-C1 Precision and accuracy of 2-D shapes.

**24. Significant Figures**

**Description:** The link can be used to understand the meaning of significant figures and rules for counting significant figures. It also contains an online significant figure calculator.

**Core Concepts: **IX-C1 Precision and accuracy of 2-D shapes.

**23. Constructing a Regular Polygons in GeoGebra**

**Description:** This video contains a tutorial on constructing polygons in GeoGebra.

**Core Concepts: **IX-C2 Exploring efficiency of 2-D shapes

**24. Finding Area and Perimeter in GeoGebra**

**Description:** This video contains a tutorial on finding area and perimeter of a shape in GeoGebra.

**Core Concepts: **IX-C2 Finding area and perimeter.

**25. 2-D Efficiency**

**Description:** This link has a video from Bhutan ELibrary. It contains a lesson on 2-D efficiency.

**Core Concepts: **IX-C2 2-D Efficiency.

**Link:** Video on mathematics key stage 4 - 2D and 3D efficiency

**26. Sides of the Triangle and Online quiz**

**Description:** Description about the sides of the triangle and Practice questions on identifying the sides.

**Core Concepts: **IX-C3 Naming the sides of the triangle.

**27. Trigonometry ratios**

**Description:** Definition of trig ratios, introduction of primary trig ratios and a video lesson related to the concept.

**Core Concepts: **IX-C3 Trigonometry ratios.

**28. Worksheet on Pythagorean Theorem**

**Description:** Worksheet on application of Pythagorean theorem in finding the missing side length.

**Core Concepts: **IX-C3 Pythagorean theorem.

**29. Trigonometric Identities**

**Description:** Explanation of Pythagorean identity and trig identities.

**Core Concepts: **IX-C3 Basic trig identities.

**30. Worksheet on Calculating Side Length**

**Description:** Calculating side length of a triangle using trig ratios.

**Core Concepts: **IX-C3 Application of trig ratios.

**31. Angles of Elevation and Depression**

**Description:** lesson introduction about angles of elevation and angles of depression, solved example and practice question.

**Core Concepts: **IX-C3 Angles of elevation and depression

**32. Video Tutorial about Value of Sin, Cos and Tan**

**Description:** Finding the value of sin, cos and tan using a calculator.

**Core Concepts: **IX-C3 C Determining the value of trig ratios with the given angle.

**33. Video Lesson of Angles of Elevation and Angles of Depression**

**Description:** Explanation of angles of elevation and angles of depression.

**Core Concepts: **IX-C3 Angles of elevation and depression.

**34. Video lesson on Area of Polygons**

**Description:** Visual explanation about finding the area of polygons.

**Core Concepts: **IX-C3 Area of polygons.

**35. Live Worksheet on Sides of a Right Triangle**

**Description:** Self assessment live worksheet on sides of a right triangle.

**Core Concepts: **IX-C3 Sides of a right triangle.

**36. Trigonometry Worksheet**

**Description:** Worksheet to find the value of trig ratios with the given angle using a calculator.

**Core Concepts: **IX-C3 Determining the value of trig ratios with the given angle.

**Link:** PDF on trigonometry worksheet T1 – labelling triangles

**37. Triangle Congruence Theorems Explained**

**Description:** This video contains lessons on congruent triangles and conditions of congruence explained.

**Core Concepts: **IX-D1 Congruence triangles and properties.

**Link:** Video on triangle congruence theorems explained: ASA, AAS, HL

**38. Similarity of Triangles**

**Description:** This video contains lessons on similar triangle properties and conditions for similarity explained.

**Core Concepts: **IX-D1 Similar triangles and properties.

**39. Math Shorts Episode 3 - Translation**

**Description:** This video explains the basic concept of translations.

**Core Concepts: **IX-D2 Translations.

**40. Math Shorts Episode 4 - Reflection**

**Description:** This video explains the basic concept of reflections.

**Core Concepts: **IX-D2 Reflections.

**41. Math Shorts Episode 2 - Rotation**

**Description:** This video explains the basic concept of rotations.

**Core Concepts: **IX-D2 Rotations.

**42. Math Shorts Episode 14 - Dilation**

**Description:** This video explains the basic concept of dilations.

**Core Concepts: **IX-D3 Dilations.

**Link:** Video on math shorts episode 14 - understanding dilations

**43. Which Chart To Use**

**Description:** The Link contains concepts related to questions to ask when deciding which type of chart to use.

**Core Concepts: **IX- E1 Collecting, displaying and analyzing data.

**Link:** Website on how to choose the right chart or graph for your data

**44. Compare Various Methods Of Displaying Data**

**Description:** The link contains concepts on which graph to choose for a given set of data.

**Core Concepts: **IX- E1 Collecting, displaying and analyzing data.

**45. Misleading Graph**

**Description:** The web link explains the meaning and features of misleading graph.

**Core Concepts: **IX- E1 Collecting, displaying and analyzing data.

**46. Math Antics - Basic Probability**

**Description:** This link contains a video tutorial which explains the basic concept of probability in a simple way.

**Core Concepts: **IX-E2 Probability.

**47. Probability**

**Description:** This link contains a video tutorial from Bhutan E-library. It explains about the probability of independent events.

**Core Concepts: **IX-E2 Dependent and independent events.

**Link****:** Video on Probability