Mathematics - Class IX 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. Exponent Laws: Integral Exponents

Description: These two links include a brief introduction to exponents and the history of exponents.

Core Concepts: Introduction and History of exponents.

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Description: The links are about the concepts and laws of exponents.

Core Concepts: Exponent Laws.

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Description: The video lesson talks about the zero and negative exponents.

Core Concepts: Zero and Negative exponents.

Link: Web page on Zero and Negative Exponents

Description: The link contains rules, methods, simplification and some examples to fractional exponents.

Core Concepts: Fractional Exponents.

Link: Web page on Fractional Exponents

Description: The link contains some examples on exponential expressions.

Core Concepts: Exponential Expressions.

Link: Web page on Exponential Expressions

2. Rational, Irrational and real Numbers

Description: These links explains a brief introduction to rational and irrational numbers and their properties.

Core Concepts: Introduction to Rational and Irrational Numbers.

Links:

Description: This link contains the discovery of an irrational number.

Core Concepts: History of Irrational Number.

Link: Web page on History of Irrational Number

Description: These videos sows what rational and irrational numbers are and how to classify them.

Core Concepts: Concept of real numbers.

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Description: This video describes the history and math behind irrational numbers..

Core Concepts: Introduction to Real Numbers.

Link: Video on Real Numbers

Description: This video is about approximating the values of irrational numbers..

Core Concepts: Estimating values of Irrational numbers.

Link: Video on how to estimate the value of irrational number

Description: This link contains how numbers are placed on a number line.

Core Concepts: Representing real number on a number line.

Link: Web page on representing Number real on a number Line

Description: This video demonstrates the order of operations of real numbers.

Core Concepts: Order of operations.

Link: Video on Order of operations

3. Set Theory

Description: The link contains introductory notes and resourceful links on Sets.

Core Concepts: Introduction to Set theory.

Link: Web page on Introduction to Set Theory

Description: The link contains concepts on types of sets and their denotations.

Core Concepts: Types of Sets.

Link: Web page on Types of sets

Description: Refer the links to understand operations on sets with the help of some examples.

Core Concepts: Operations on set.

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4. Commercial Mathematics

Description: The link contains tips on how to become financially literate.

Core Concepts: Financial literacy introduction.

Link: Web page on Financial Literacy Definition

Description: The video demonstrates how to calculate simple interest.

Core Concepts: Calculating Simple interest.

Link: Video on Simple Interest Calculation

Description: This video demonstrates how to solve problems involving purchases using the idea of percentage.

Core Concepts: Purchasing Decision.

Link: Video on concept of Purchasing Decision and its calculation

5. Polynomial Expressions

Description: This link provides a basic introduction to Polynomials. It explains how to identify the types of polynomials. It also explains how to identify all of the terms in a polynomial.

Core Concepts: Introduction to Polynomials.

Link: Web page on Introduction to Polynomials

Description: This link provides concepts on definition of polynomials, polynomial degree, and types of polynomials.

Core Concepts: Types of Polynomials.

Link: Web page on Types of Polynomials

Description: The links contains addition and subtraction of polynomials pictorially and symbolically & virtual manipulations of polynomial tiles which can be used to model polynomial operations .

Core Concepts: Operations on Linear Polynomials.

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Description: This link demonstrates how to multiply polynomials symbolically.

Core Concepts: Multiplying Polynomials.

Link: Web page on Multiplying polynomials

Description: These links demonstrates how to divide polynomials in a tabular method and by using a long method.

Core Concepts: Dividing Polynomials (tabular and long method).

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6. Linear and Non-Linear Relations and Graphs

Description: The link discusses the applications of Linear equations.

Core Concepts: Application of Linear Equations in real life.

Link: Web page on Application of Linear Equations

Description: The video link includes a lesson on how to identify relations.

Core Concepts: Identify relations.

Link: Video on Identifying relations

Description: The video link discusses how to graph equations in slope and y - intercept form.

Core Concepts: Graphing equations in slope and y-intercept form.

Link: Video on Graphing a line in slope and y-intercept

Description: The video link demonstrates how to graph equations when given in standard form.

Core Concepts: Graphing equations in standard form.

Link: Video on Graphing Lines in Standard Form

Description: The link explains how to write the equations from the graphs.

Core Concepts: Determining the equations from the graph.

Link: Web page on Determining the equations from graphs

Description: The video link contains discussions on independent and dependent variables.

Core Concepts: Independent and dependent variables.

Link: Video on Independent vs. Dependent Variables

Description: The videos and web link explain the concept of continuous and discrete data.

Core Concepts: Continuous and discrete data.

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Description: The video link is about interpolation and extrapolation.

Core Concepts: Interpolation and extrapolation.

Link: Video on Interpolation and Extrapolation

Description: The link is about how to derive the equations.

Core Concepts: Determining the equations.

Link: Web page Deriving the Equation y = mx+b

Description: The weblink contains concepts on some examples to model functions.

Core Concepts: Modeling functions.

Link: Web page on Modeling with Functions

7. Linear equations and Inequalities

Description: The link is about introduction to linear inequalities.

Core Concepts: Introduction to linear inequalities.

Link: Web page on What are Inequalities?

Description: The video explains how to balance an equation to find the value of the variable.

Core Concepts: Balancing equations.

Link: Video on Balancing Equations

Description: The weblink contains concepts related to solving equations using inverse operations.

Core Concepts: Solving Equations.

Link: Website on introduction to sets

Description: The links explains how to solve linear  inequality problems algebraically and graphically & to understand the concept of solving linear inequalities.

Core Concepts: Solving linear inequalities.

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Description: The link contains concepts that demonstrate how to graph a linear inequality.

Core Concepts: The graph of linear inequality.

Link: Web link on Graphing an Inequality

Description: The URL contains a lesson on how to write an inequality from the graph.

Core Concepts: Writing inequality from a graph.

Link: Web page on Writing Inequality from the graph

8. Precision and Accuracy

Description: This video explains what precision and  accuracy are and how it can help us to measure things more accurately.

Core Concepts: Introduction to linear  precision and accuracy.

Link: Video on difference between precision and accuracy

Description: This video explains how to interpret measurements based on the precision of the instrument.

Core Concepts: Precision on an instrument.

Link: Video on what is precision

Description: This link contains the meaning of significant figures and rules for counting significant figures.

Core Concepts: Significant Figures.

Link: Web page on Significant Figures

9. Properties of 2-D efficiency

Description: The video tutorial can be used to demonstrate how to construct 2-D shapes to compare their efficiency.

Core Concepts: Comparing 2-D efficiency.

Link: Video on Comparing efficiency of Regular Polygons

Description: The video tutorial demonstrates efficiency of various 2-D shapes using Geogebra by keeping either the perimeter or the area the same.

Core Concepts: Comparing efficiency through construction.

Link: Video on Area of 2-D shapes

10. Congruence and Similarity of Triangles

Description: This video contains each condition of congruence in detail with pictorial animations.

Core Concepts: Triangle Congruence Theorems.

Link: Video on condition of congruence

Description: This link encompasses the application of a similar triangle along with three conditions of similarity.

Core Concepts: Application of similar triangles.

Link: Video on applications of similar triangles

Description: This video explains similar triangles’ properties and conditions for similarity.

Core Concepts: Properties of similarity.

Link: Video on Properties of similar triangles

11. Trigonometry

Description: The links shows the history of trigonometry.

Core Concepts: Introduction to Trigonometry.

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Description: The video link is about how to name the sides with respect to the given angle.

Core Concepts: Naming the sides.

Link: Video on naming the sides based on angle

Description: The video link discusses trigonometric ratios for beginners.

Core Concepts: Trigonometric Ratios.

Link: Video on Trigonometry ratios

Description: The links contains the worksheets on Pythagorean theorem.

Core Concepts: Pythagorean Theorem.

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Description: The links explains the Pythagorean identities and some examples on trig identities.

Core Concepts: Trigonometric Identities.

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Description: The video explains the concept of angles of elevation and Depression with solved examples.

Core Concepts: Angles of Elevation and Depression.

Link: Video on Angles Of Elevation & Depression

Description: The links contains the worksheets on trigonometric ratios.

Core Concepts: Calculating side lengths and angles.

Link: Worksheet on Finding Sides and Angles

Description: This video can be used to teach the concept of calculating the area of a triangle using trigonometry.

Core Concepts: Calculating areas of polygons.

Link: Video on calculating area of triangle using trigonometry

Description: This video explains how to calculate the area of a regular pentagon using trigonometry. Same process can be used to calculate the area of other regular polygons.

Core Concepts: Calculating areas of  regular polygons.

Link: Video on calculating area of a regular pentagon

12. Transformation

Description: The web link contains concepts on introduction to transformation.

Core Concepts: Introduction to Transformation.

Link: Web page on introduction to Transformation geometry

Description: Refer the web link to understand the application and scope of learning transformation in real life.

Core Concepts: Application of Transformation.

Link: Web page on Transformations in Real Life

Description: The video contains basic explanations on types of transformations.

Core Concepts: Types of transformation.

Link: Video on Transformation and its types

Description: Use the links to understand the concept of translation and its mapping notation.

Core Concepts: Translation.

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Description: Use the links to understand the concept of reflection and its mapping notation.

Core Concepts: Reflection.

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Description: Use the links to understand the concept of rotation and its mapping notation.

Core Concepts: Rotation.

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Description: Use the links to understand the concept of dilation and its mapping notation.

Core Concepts: Dilation.

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Description: Use the link to understand composite or combined transformation.

Core Concepts: Composite Transformation.

Link: Web page on Notation for Composite Transformations

13. Collecting, Displaying and Analyzing Data

Description: The video demonstrates the process of constructing stem and leaf plots.

Core Concepts: Stem and leaf plot.

Link: Video on Stem and leaf plot

Description: The video demonstrates the process of constructing a box and whisker plot.

Core Concepts: Box and whisker plot.

Link: Video on Box plot

Description: The videos demonstrates the process of constructing a circle graph and a bar graph.

Core Concepts: Circle and Bar graph.

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Description: The videos demonstrate the process of constructing a Histogram.

Core Concepts: Histogram.

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Description: The link explains the reasons for choosing a right graph to represent the set of data.

Core Concepts: Choosing a right type of graph.

Link: Web page on Choosing right graph type

Description: Use the link to explain the reasons for misleading graphs.

Core Concepts: Misleading graph.

Link: Web page on Misleading graph

14. Probability

Description: This video is a quick introduction to the fascinating history of Probability Theory.

Core Concepts: Introduction to probability.

Link: Video on history of probability

Description: This link provides access to various probability devices that can be used for conducting an experimental probability.

Core Concepts: Probability devices.

Link: Virtual manipulative of probability devices

Description: These videos explain the basic concepts of probability and calculation of probability.

Core Concepts: Calculating probability.

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