**1. Exponents and Square Roots**

**Description:** This web link contains a video that explains the concept and relation between radical and exponents.

**Core Concepts:** X-A1 Radical.

**2. Simplifying Square Roots**

**Description:** This web link contains a video lesson which explains simplifying square roots in a simple way.

**Core Concepts:** X-A1 Simplifying square roots.

**3. Simplifying Radical Expressions**

**Description:** This web link contains a video lesson which explains simplifying square roots in a simple way.

**Core Concepts:** X-A1 Simplifying radicals and operations on radical expressions.

**Links:**

**4. Introducing Matrices**

**Description:** The web link contains a video lesson on matrices and part of matrix.

**Core Concepts:** X-A2 Matrices and network.

**5. Identity Matrix**

**Description:** The web link explains the concept of identity matrix with examples.

**Core Concepts: **X-A2 Matrices and network.

**6. Networks**

**Description:** The web link contains a video that explains conversion of networks into matrices and vice versa.

**Core Concepts:** X-A2 Matrices and network.

**7. Sequence and Series**

**Description:** Explains about A.P,G.P, Arithmetic Mean and Geometric Mean.

**Core Concepts:** X-A4 Sequence and series.

**8. Convert from Slope Intercept Form to Standard Form**

**Description:** This web link contains a video lesson on converting of slope intercept form to standard form.

**Core Concepts:** X-B1 Forms of linear functions.

**Link:** Video on how to convert slope-intercept form to standard form

**9. What are Functions?**

**Description:** This web link contains a video lesson explaining the basic concept of functions.

**Core Concepts:** X-B1 Functions.

**10. Graphing Linear Inequalities**

**Description:** This web links contain video lessons on graphing linear inequalities.

**Core Concepts:** X-B1 Graphing linear inequalities.

**11. Solving System of Linear Equations**

**Description:** The web link contains a video demonstrating the solving system of linear equations using all three methods.

**Core Concepts:** X-B2 Solving system of linear equations.

**Link:** Video lesson on solutions to systems of linear equations

**12. Graphing Quadratic Function in Vertex Form**

**Description:** The web link contains a video on graphing quadratic functions in vertex form.

**Core Concepts:** X-B3 Construct and analyze graphing functions.

**13. Calculating Roots from Quadratic Graph**

**Description:** The web link contains a video on calculating roots of a quadratic equation from its corresponding graph.

**Core Concepts:** X-B3 Construct and analyze graphing functions.

**14. Solving Non-Linear Equations by Factoring using Different Strategy**

**Description:** This web link contains a video lesson on solving non-linear equations by factoring in different strategy.

**Core Concepts:** X-B4 Solving non-linear equations.

**15. Factoring Trinomials using Sum and Product Rule**

**Description:** This web link contains a video lesson on solving non-linear equations using sum and product methods.

**Core Concepts:** X-B4 Solving non-linear equations.

**16. Solving Non-Linear Equations**

**Description:** This web link contains a video lesson from Bhutan e-Library on solving non-linear equations.

**Core Concepts:** X-B4 Solving non-linear equations.

**17. Surface Area of Cylinder**

**Description:** Derivation of surface area of cylinder.

**Core Concepts:** X-C1 Surface area of cylinder.

**18. Surface Area of Sphere**

**Description: **Derives the formula of surface area of sphere by relating it with the surface area of the cylinder. Derivation of formula of total surface area of sphere.

**Core Concepts:** X-C1 Surface area of sphere.

**Links:**

**19. Surface area of Pyramids and Cones**

**Description: **The two video links show the** **calculation of surface area for the 3-d shapes: cone and pyramid and how to calculate slant height.

**Core Concepts:** X-C1 Surface area of cones and pyramids.

**Links:**

**20. Volume on Prisms, Cylinders, Cones and Spheres**

**Description: **This video explains about the volume of prisms, cylinders, cones and spheres.

**Core Concepts:** X-C2 volume of 3-D shapes.

**Link: **Video on volume of prisms, cylinders, cones and spheres

**21. 3-D Efficiency**

**Description: **The web link contains a video on 3D efficiency.

**Core Concepts:** X-C3 Explore, solve and apply properties.

**22. Radian**

**Description: **Derives the relation between pie radians = 180 degrees and defines radian.

**Core Concepts:** X-C4 Derivation of relation: pi radians = 180 degrees.

**Link: **Video on meaning of radians and relation between radians and degrees

**23. Worksheet for Practicing the Conversion**

**Description: **Worksheet for practice in converting degrees to radians and vice versa.

**Core Concepts:** X-C4 Converting radians to degrees and vice versa worksheet.

#### 24. Sign Conventions of T-Functions

**Description: **Convention of signs. Explains signs of trigonometric functions based on the x and y coordinates.

**Core Concepts:** X-C4 Signs of trigonometric functions.

**Links: **

#### 25. T-Ratios of Standard Angles

**Description: **Illustration on determining the t-ratios of standard angles. Presents how the t-ratios of standard angles are derived. Demonstrates the application of values of t-ratios of standard angle in problem solving.

**Core Concepts:** X-C4 T-ratios of standard angles.

**Links: **

#### 26. T-Ratios of Allied Angles

**Description: **Explains about allied angles of T-functions.

**Core Concepts:** X-C4 T-ratios of allied angles.

#### 27. Application of T-Ratios of Allied Angles in Solving Problems

**Description: **Illustrates the application of t-ratios of allied angles in solving problems.

**Core Concepts:** X-C4 Applications of t-ratios of allied angles.

**Links:**

#### 28. Worksheet for Table of T-Functions

**Description: **Table of t-functions and grid paper.

**Core Concepts:** X-C4 Graphing t-functions.

#### 29. Periods of T-Functions

**Description: **Defines period and pictorial illustration on how to determine the period from the T-function graph.

Graphs of t-functions illustrated using GeoGebra. Simulation of the trig-function graph.

**Core Concepts:** X-C4 Periods of T-functions

**Links:**

**Description: **Activity on period of T-function.

**Core Concepts:** X-C4 Periods of T-functions

**30. Trigonometric Identities**

**Description: **Derives the square relations/Pythagorean identities.

**Core Concepts:** X-C4 Trigonometric identities

#### 31. 2-D Reflectional Symmetry

**Description: **The web link explains the concept of 2-D reflectional symmetry.

**Core Concepts:** X-D1 Symmetry.

#### 32. 3-D Reflectional Symmetry

**Description: **The web link explains the concept of 3-D reflectional symmetry.

**Core Concepts:** X-D1 Symmetry.

**Link:** Video on 3-D symmetry

#### 33. 2-D Rotational Symmetry

**Description: **The web link explains the 2-D rotational symmetry with animation.

**Core Concepts:** X-D1 Symmetry.

**34. 3-D Rotational Symmetry**

**Description: **The web link explains the 3-D rotational symmetry with animation.

**Core Concepts:** X-D1 Symmetry.

#### 35. Comparing Reflectional and Rotational Symmetry

**Description: **The web link contains an explanation on comparing rotational and reflectional symmetry.

**Core Concepts:** X-D1 Symmetry.

#### 36. How to Construct Circumcircle and Incircle

**Description: **This web link contains a video tutorial on construction of circumcircle and incircle.

**Core Concepts:** X-D2 Circumcircle and Incircle.

#### 37. Incenter, Circumcenter, Orthocenter & Centroid of a Triangle

**Description: **This web link contains a video link on construction of all the centers of a triangle: circumcenter, incenter, orthocenter and centroid.

**Core Concepts:** X-D2 Orthocenter and centroid.

#### 38. Choosing a Graph

**Description: **The web link contains concepts on which graph to choose.

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

#### 39. Creating Histogram

**Description: **The web link explains the process of creating histogram.

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

**Link:** Webpage on histogram

#### 40. Stem and Leaf Plot

**Description: **The web link explains the process of creating stem and leaf plot.

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

#### 41. Box Plot

**Description: **The web link explains the process of creating box plot.

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

**Link:** Webpage on box plot

#### 42. Normal Distribution

**Description: **The web link demonstrates real life situations of normal distribution.

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

#### 43. Data Involving Two Variables

**Description: **The web link demonstrates real life situations of normal distribution.

**Core Concepts:** X-E2 Data Involving two variables.

#### 44. Probabilities of Dependent and Independent Events

**Description: **This web link contains a video lesson from Bhutan e-Learning project on probabilities of dependent and independent events.

**Core Concepts:** X-E2 Probability of dependent and independent events.

#### 45. Conditional Probability

**Description: **This web link contains a video lesson on conditional probability.

**Core Concepts:** X-E2 Conditional probability