Math: High school & college Ages 14-18 ● Media ready

Algebra 1

The Algebra 1 course, often taught in the 9th grade, covers Linear equations, inequalities, functions, and graphs; Systems of equations and inequalities; Extension of the concept of a function; Exponential models; and Quadratic equations, functions, and graphs. Khan Academy's Algebra 1 course is built to deliver a comprehensive, illuminating, engaging, and Common Core aligned experience! **Teaching this course? Check out our [teacher resources](https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:alg1-ccss-teacher-resources)!**

17 units 95 lessons 227 videos 12 on CDN

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Unit 2 Algebra foundations

1 Overview and history of algebra Free 6 video(s) ● 2 Introduction to variables Free 4 video(s) ● 3 Substitution and evaluating expressions Free 2 video(s) ● 5 Combining like terms 🔒 Pro 6 Introduction to equivalent expressions 🔒 Pro 8 Division by zero 🔒 Pro 2 video(s) 20 Quadratic functions & equations: Unit test 🔒 Pro

Unit 3 Solving equations & inequalities

1 Linear equations with variables on both sides 🔒 Pro 1 video(s) 2 Linear equations with parentheses 🔒 Pro 4 Analyzing the number of solutions to linear equations 🔒 Pro 5 Linear equations with unknown coefficients 🔒 Pro 7 Multi-step inequalities 🔒 Pro 8 Compound inequalities 🔒 Pro 5 video(s)

Unit 4 Working with units

1 Rate conversion 🔒 Pro 3 video(s) 2 Appropriate units 🔒 Pro 4 video(s) 3 Word problems with multiple units 🔒 Pro 4 video(s)

Unit 5 Linear equations & graphs

1 Two-variable linear equations intro 🔒 Pro 1 video(s) 2 Slope 🔒 Pro 2 video(s) 4 Horizontal & vertical lines 🔒 Pro 5 x-intercepts and y-intercepts 🔒 Pro 7 Applying intercepts and slope 🔒 Pro 4 video(s) 8 Modeling with linear equations and inequalities 🔒 Pro 1 video(s)

Unit 6 Forms of linear equations

1 Intro to slope-intercept form 🔒 Pro 2 video(s) 2 Graphing slope-intercept equations 🔒 Pro 4 Writing slope-intercept equations 🔒 Pro 1 video(s) 6 Point-slope form 🔒 Pro 7 Standard form 🔒 Pro 2 video(s) 8 Summary: Forms of two-variable linear equations 🔒 Pro 2 video(s)

Unit 7 Systems of equations

1 Introduction to systems of equations 🔒 Pro 3 video(s) 3 Solving systems of equations with substitution 🔒 Pro 4 Solving systems of equations with elimination 🔒 Pro 2 video(s) 5 Equivalent systems of equations 🔒 Pro 4 video(s) 7 Number of solutions to systems of equations 🔒 Pro 8 Systems of equations word problems 🔒 Pro

Unit 8 Inequalities (systems & graphs)

1 Checking solutions of two-variable inequalities 🔒 Pro 2 video(s) 3 Graphing two-variable inequalities 🔒 Pro 5 video(s) 5 Modeling with linear inequalities 🔒 Pro 9 video(s)

Unit 9 Functions

1 Evaluating functions 🔒 Pro 2 Inputs and outputs of a function 🔒 Pro 1 video(s) 4 Functions and equations 🔒 Pro 5 Interpreting function notation 🔒 Pro 2 video(s) 6 Introduction to the domain and range of a function 🔒 Pro 4 video(s) 8 Determining the domain of a function 🔒 Pro 5 video(s) 9 Recognizing functions 🔒 Pro 11 Maximum and minimum points 🔒 Pro 2 video(s) 12 Intervals where a function is positive, negative, increasing, or decreasing 🔒 Pro 1 video(s) 13 Interpreting features of graphs 🔒 Pro 3 video(s) 15 Average rate of change 🔒 Pro 2 video(s) 16 Average rate of change word problems 🔒 Pro 17 Intro to inverse functions 🔒 Pro 4 video(s)

Unit 10 Sequences

1 Introduction to arithmetic sequences 🔒 Pro 5 video(s) 2 Constructing arithmetic sequences 🔒 Pro 4 video(s) 4 Introduction to geometric sequences 🔒 Pro 4 video(s) 5 Constructing geometric sequences 🔒 Pro 2 video(s) 7 Modeling with sequences 🔒 Pro 1 video(s) 8 General sequences 🔒 Pro 2 video(s)

Unit 11 Absolute value & piecewise functions

1 Graphs of absolute value functions 🔒 Pro 3 Piecewise functions 🔒 Pro

Unit 12 Exponents & radicals

1 Exponent properties review 🔒 Pro 3 Radicals 🔒 Pro 2 video(s) 5 Simplifying square roots 🔒 Pro

Unit 13 Exponential growth & decay

1 Exponential vs. linear growth 🔒 Pro 4 video(s) 2 Exponential expressions 🔒 Pro 3 video(s) 4 Graphs of exponential growth 🔒 Pro 2 video(s) 5 Exponential vs. linear growth over time 🔒 Pro 1 video(s) 6 Exponential growth & decay 🔒 Pro 3 video(s) 8 Exponential functions from tables & graphs 🔒 Pro 7 video(s) 9 Exponential vs. linear models 🔒 Pro 2 video(s)

Unit 14 Quadratics: Multiplying & factoring

1 Multiplying monomials by polynomials 🔒 Pro 1 video(s) 2 Multiplying binomials 🔒 Pro 3 video(s) 4 Special products of binomials 🔒 Pro 4 video(s) 5 Introduction to factoring 🔒 Pro 1 video(s) 6 Factoring quadratics intro 🔒 Pro 5 video(s) 8 Factoring quadratics by grouping 🔒 Pro 5 video(s) 9 Factoring quadratics with difference of squares 🔒 Pro 4 video(s) 10 Factoring quadratics with perfect squares 🔒 Pro 6 video(s) 12 Strategy in factoring quadratics 🔒 Pro 2 video(s)

Unit 15 Quadratic functions & equations

1 Intro to parabolas 🔒 Pro 3 video(s) 2 Solving and graphing with factored form 🔒 Pro 3 video(s) 4 Solving by taking the square root 🔒 Pro 4 video(s) 5 Vertex form 🔒 Pro 3 video(s) 7 Solving quadratics by factoring 🔒 Pro 5 video(s) 8 The quadratic formula 🔒 Pro 4 video(s) 10 Completing the square intro 🔒 Pro 4 video(s) 11 More on completing the square 🔒 Pro 5 video(s) 12 Strategizing to solve quadratic equations 🔒 Pro 1 video(s) 14 Quadratic standard form 🔒 Pro 3 video(s) 15 Features & forms of quadratic functions 🔒 Pro 7 video(s) 17 Comparing quadratic functions 🔒 Pro 2 video(s) 18 Transforming quadratic functions 🔒 Pro 3 video(s)

Unit 16 Irrational numbers

1 Irrational numbers 🔒 Pro 2 Sums and products of rational and irrational numbers 🔒 Pro 6 video(s) 3 Proofs concerning irrational numbers 🔒 Pro 3 video(s)

Unit 17 Creativity in algebra

1 Creativity in algebra 🔒 Pro 3 video(s)

Unit 18 Teacher resources

1 Welcome to teacher resources 🔒 Pro