मुफ़्त पाठ

साफ़-साफ़ समझाए गए मुफ़्त वीडियो पाठ

हर पाठ एक छोटा व्हाइटबोर्ड वीडियो है, साथ में लिखित व्याख्या, मुख्य शब्द और हल किए गए उदाहरण। देखने, साझा करने और कक्षा में इस्तेमाल करने के लिए मुफ़्त।

गणित · बीजगणित Algebraic Fractions: Simplifying, Adding and Subtracting Cancelling common factors in algebraic fractions and adding or subtracting them using a common denominator. 9Ae.02 गणित · बीजगणित Algebraic Identities: Squares of Binomials and the Difference of Two Squares The identities for (a + b)2, (a - b)2 and a2 - b2, where they come from, and how they speed up expansion and factorising. 8:ALG:028:ALG:039:U2:01 गणित · ज्यामिति Area of Trapeziums and Compound Shapes The area of a trapezium as half the sum of the parallel sides times the height; splitting a compound shape into rectangles and triangles… 9:U5:01 गणित · ज्यामिति Circumference and Area of a Circle Radius, diameter and pi; circumference = pi x d and area = pi x r2; answers in terms of pi and to a given accuracy; semicircles and… 9Gg.01 गणित · बीजगणित Coordinates and Plotting Linear Graphs Coordinates in all four quadrants, making a table of values from a linear equation, and plotting a straight-line graph. 7As.047As.057As.06 गणित · बीजगणित Expanding Double Brackets Multiplying two binomials term by term, collecting like terms, and checking the expansion by substitution. 9Ae.028:ALG:02 गणित · बीजगणित Expanding Single Brackets Multiplying a bracket by a number or a term using the distributive law, and simplifying the result. 7Ae.038Ae.038:ALG:02 गणित · बीजगणित Factorising by Taking Out a Common Factor Reversing expansion by finding the highest common factor of the terms and writing the expression as a product. 8Ae.038:ALG:03 गणित · बीजगणित Forming and Solving Equations from Word Problems Turning a written situation into an equation, choosing what the variable stands for, solving it, and interpreting the answer. 7Ae.068Ae.069Ae.05 गणित · बीजगणित Formulae: Substituting and Changing the Subject Using formulae from science and everyday life, substituting values, and rearranging a formula to make a different variable the subject. 7Ae.058Ae.059Ae.04 गणित · बीजगणित Gradient and Intercept of a Straight Line Reading gradient and y-intercept from a graph and from y = mx + c, and writing the equation of a line from its features. 8As.069As.06 गणित · बीजगणित Laws of Indices with Algebraic Terms Multiplying and dividing powers of the same base, raising a power to a power, and the zero and negative indices with algebraic terms. 9Ae.019Ae.027:ALG:03 गणित · बीजगणित Linear Inequalities and Their Solutions on a Number Line Solving linear inequalities, what happens when multiplying or dividing by a negative, and showing solution sets on a number line. 7Ae.078Ae.079Ae.07 गणित · ज्यामिति Perimeter and Area of Rectangles, Triangles and Parallelograms Perimeter as the distance around a shape; area of a rectangle, a triangle (half base times height) and a parallelogram (base times… 9:U5:01 गणित · ज्यामिति Pythagoras' Theorem in Right-Angled Triangles In a right-angled triangle the square on the hypotenuse equals the sum of the squares on the other two sides; finding the hypotenuse,… 9Gg.107:GEO:02 गणित · बीजगणित Quadratic Expressions and Factorising Trinomials Recognising quadratic expressions, factorising x2 + bx + c by finding two numbers, and using the factors to solve simple quadratic… 9Ae.028:ALG:039:U2:01 गणित · बीजगणित Sequences and the nth Term Term-to-term and position-to-term rules, finding the nth term of an arithmetic sequence, and using it to generate and test terms. 7As.017As.028As.01 गणित · बीजगणित Simplifying Expressions by Collecting Like Terms Adding and subtracting like terms to write an expression in its simplest form, including terms with negative coefficients. 7Ae.027Ae.037:ALG:02 गणित · बीजगणित Simultaneous Linear Equations Solving a pair of linear equations by elimination and by substitution, and reading the solution as the crossing point of two lines. 9Ae.06 गणित · बीजगणित Solving Linear Equations with Brackets and Unknowns on Both Sides Expanding brackets, collecting the unknown on one side, and solving equations that have the variable on both sides. 8Ae.068:ALG:01 गणित · बीजगणित Solving One-Step and Two-Step Linear Equations Keeping an equation balanced, undoing operations in the right order, and checking a solution by substitution. 7Ae.067:ALG:01 गणित · बीजगणित Substitution: Evaluating Algebraic Expressions Replacing variables with numbers, applying the order of operations, and evaluating expressions with negative and fractional values. 7Ae.057As.037:ALG:02 गणित · ज्यामिति Surface Area and Volume of Cuboids, Prisms and Cylinders Finding the volume of a cuboid, a triangular prism and a cylinder as cross-section area times length, and their surface area as the sum of… 9Gg.049Gg.059:U5:02 गणित · बीजगणित Terms, Coefficients and Like Terms Breaking an expression into its terms, identifying coefficients and constants, and recognising which terms are like terms. 7Ae.037:ALG:028:ALG:02 गणित · ज्यामिति Types of Angles: Angles on a Straight Line and Around a Point Acute, right, obtuse and reflex angles; angles on a straight line add to 180 degrees and angles around a point add to 360 degrees;… 7Gg.127Gg.137:GEO:01 गणित · बीजगणित Variables, Constants and Algebraic Expressions What a variable stands for, how letters and numbers combine into expressions, and how to read and write expressions from words. 7Ae.017Ae.048Ae.01 विज्ञान · जीव विज्ञान A Balanced Diet Proteins, carbohydrates, fats, water, minerals and vitamins — what each does and what happens without it. 8Bp.016:ch03 विज्ञान · रसायन विज्ञान Acids, Alkalis and the pH Scale Acidity and alkalinity as chemical properties, the pH scale, indicators, and neutralisation. 7Cp.027Cp.037Cc.04 विज्ञान · जीव विज्ञान Aerobic Respiration Energy release in mitochondria, the word equation glucose + oxygen -> carbon dioxide + water, and why respiration is not breathing. 8Bp.048Bp.0510:U2:01 विज्ञान · जीव विज्ञान Blood and Its Components Plasma, red blood cells, white blood cells and platelets, and what each transports or protects. 8Bs.027:ch09 विज्ञान · जीव विज्ञान Cells The cell as the basic unit of life: structures and their functions, plant and animal cells, specialised cells, and how cells build… 7Bs.017Bs.027Bs.03 विज्ञान · रसायन विज्ञान Classification of Elements and the Periodic Table Why the elements are arranged the way they are: periods and groups, metals and non-metals, how position follows atomic structure, and the… 7Cm.017Cm.027Cm.03 विज्ञान · रसायन विज्ञान Elements, Compounds and Mixtures Atoms and elements, compounds and mixtures including alloys, represented with the particle model. 7Cm.047Cm.079:U1:02 विज्ञान · जीव विज्ञान Food Chains, Food Webs, Decomposers and Ecosystem Dynamics Producers, consumers and decomposers; constructing and reading food chains and webs; energy flow in an ecosystem. 7Be.017Be.0210:U5:01 विज्ञान · भौतिकी Forces, Motion and Turning Forces Balanced and unbalanced forces and their effect on motion, and turning forces (moments). 8Pf.038Pf.04 विज्ञान · भौतिकी Heat Transfer: Conduction, Convection and Radiation Heat versus temperature, and the three ways thermal energy moves from hotter to colder places. 9Pf.029Pf.057:ch07 विज्ञान · जीव विज्ञान Inheritance and Variation Chromosomes, genes and DNA; inheritance of sex through XX and XY; variation within a species and its genetic basis. 9Bp.029Bp.0310:U2:04 विज्ञान · जीव विज्ञान Joints and Antagonistic Muscles Ball-and-socket and hinge joints, and how pairs of muscles such as biceps and triceps move bones. 8Bs.01 विज्ञान · जीव विज्ञान Photosynthesis How plants make food in chloroplasts, and the word equation for photosynthesis. 9Bp.069Bp.07 विज्ञान · जीव विज्ञान Plant and Animal Cells Compared Cell membrane, cytoplasm, nucleus, mitochondria, cell wall, chloroplasts and vacuole — what plant and animal cells share and where they… 7Bs.049:U2:01 विज्ञान · भौतिकी Pressure in Solids, Liquids and Gases Pressure as force over area, and particle theory explaining pressure in liquids and gases. 8Pf.058Pf.068:ch06 विज्ञान · रसायन विज्ञान Reactivity of Metals The reactivity series; metals with oxygen, water and dilute acids; displacement reactions. 8Cc.039Cc.0210:U1:03 विज्ञान · भौतिकी Reflection and Refraction of Light The law of reflection at plane surfaces, refraction at air-glass and air-water boundaries, and dispersion through a prism. 8Ps.018Ps.028Ps.03 विज्ञान · रसायन विज्ञान Separating Mixtures Filtration, evaporation, crystallisation and paper chromatography — which separation suits which mixture and why. 8Cp.029Cc.036:ch09 विज्ञान · भौतिकी Sound Waves Vibrations, why sound needs a medium, echoes, and waveforms: amplitude and loudness, frequency and pitch. 7Ps.017Ps.029Ps.01 विज्ञान · जीव विज्ञान Specialised Cells and Tissues How red blood cells, neurones, ciliated cells, root hair cells and palisade cells are shaped for their jobs, and how cells build tissues… 7Bs.039:U2:02 विज्ञान · रसायन विज्ञान States of Matter and the Particle Model Solids, liquids and gases in terms of particle arrangement, separation and motion; changes of state; diffusion. 7Cm.068Pf.079:U1:01 विज्ञान · रसायन विज्ञान Structure of the Atom The Rutherford model: nucleus of protons and neutrons, electrons in shells, charges, and how atoms hold together. 8Cm.018Cm.029:U1:04 विज्ञान · जीव विज्ञान The Human Respiratory System Lungs, airways, alveoli, diaphragm and intercostal muscles; breathing versus respiration; gas exchange by diffusion. 8Bs.038Bs.047:ch09 विज्ञान · जीव विज्ञान Transport in Plants Water and minerals from root hair cells through xylem to the leaves, transpiration, and the minerals plants need. 9Bs.019Bp.057:ch10 विज्ञान · पृथ्वी और अंतरिक्ष Weather and Climate The difference between weather and climate, natural climate cycles, and atmospheric change. 8ESc.018ESc.028ESc.03