Khan Academy
Khan Academy: Fitting Quadratic and Exponential Functions to Scatter Plots
Determine if a quadratic or exponential model fits a data set better, then use the model to make a prediction. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
CK-12 Foundation
Ck 12: Analysis: Quadratic Formula and Complex Sums
[Free Registration/Login may be required to access all resource tools.] In this lesson students identify complex roots of quadratic functions with the quadratic formula, and adding and subtracting complex numbers. Students examine guided...
CK-12 Foundation
Ck 12: Analysis: Distance Between a Point and a Plane
[Free Registration/Login may be required to access all resource tools.] A review of the three major methods of solving quadratic functions for ''X'' intercepts. Students examine guided notes, review guided practice, watch instructional...
Purple Math
Purplemath: Algebra Resources
Purplemath contains about 40 different lessons on various algebra topics. The lessons are divided into five different sections: preliminary topics, beginning algebra, intermediate algebra, advanced algebra, and word problems. The lessons...
CK-12 Foundation
Ck 12: Algebra: Factorization of Quadratic Expressions
[Free Registration/Login may be required to access all resource tools.] This lesson covers factoring quadratics when the leading coefficient is not one. Students can watch a video on factoring and then practice by attempting the problems...
University of St. Andrews (UK)
University of St. Andrews: Quadratic Equations History
This site from the University of St. Andrews provides an extensive history of quadratic, cubic, and quartic equations including various historical figures and their contributions to modern methods of solving quadratics.
Purple Math
Purplemath: Graphing Quadratic Functions: Introduction
The most basic quadratic is y = x2. The general technique for graphing quadratics is the same as for graphing linear equations. The quadratics graph as curvy lines (called "parabolas"), rather than the straight lines generated by linear...
University of Guelph
University of Guelph: Physics Tutorials: Algebra
This site reviews factoring quadratics, factoring higher order polynomials, and partial fractions.
Khan Academy
Khan Academy: Factor Polynomials: Quadratic Methods (Challenge)
Factor "advanced" polynomials (i.e. polynomials of various degrees and or with two variables) using quadratic factorization methods. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video...
CK-12 Foundation
Ck 12: Algebra: Comparing Methods for Solving Quadratics
[Free Registration/Login may be required to access all resource tools.] Practice choosing methods for solving quadratic problems.
CK-12 Foundation
Ck 12: Identifying Function Models: Linear, Exponential, and Quadratic Models
[Free Registration/Login may be required to access all resource tools.] Learn how to distinguish between linear, exponential, and quadratic models.
Purple Math
Purplemath: Graphing General Polynomials, Radicals, Rationals, and Piecewise Fun
This resource provides an overview of graphing, giving examples of general polynomial, radical, rational, and piecewise functions. Also includes advice on common mistakes made by students.
CK-12 Foundation
Ck 12: Algebra: Graphs of Quadratic Functions in Intercept Form
[Free Registration/Login may be required to access all resource tools.] Find the x-intercepts and vertex of a quadratic function by writing it in intercept form and solve real-world problems. Students examine guided notes, review guided...
Purple Math
Purplemath: Solving Quadratic Inequalities: Concepts
Introduces a conceptual basis for solving quadratic inequalities, looking at linear inequalities and using a knowledge of what quadratic graphs look like.
Thinkport Education
Thinkport: Algebra Ii: Regression
Build on your understanding of modeling with linear, quadratic and exponential functions to begin to include other function families.
CK-12 Foundation
Ck 12: Algebra Ii: 1.14 Polynomial Models
Learning to express real-life situations as mathematical functions (models) allows seemingly complex ideas and actions to be broken down into smaller, simpler parts and analyzed. In this section are three types of of those models:...
National Council of Teachers of Mathematics
Nctm: Illuminations: Proof Without Words: Completing the Square
Use this interactive geometric proof to complete the square using geometry.
Pennsylvania State University
Penn State Univ.: Quadratic Functions/sample Problem
Penn State University offers a sample problem finding roots of a quadratic function.
ClassFlow
Class Flow: Quadratic Curves Algebra
[Free Registration/Login Required] In this flipchart, students interpret and graph quadratic curves. Students solve quadratic equations and then use the graphing features to graph the resultant quadratic curve.
ClassFlow
Class Flow: Solutions to Quadratics
[Free Registration/Login Required] Shows students how to solve for x within a quadratic function (no factoring) and identify the root(s) of the function.
ClassFlow
Class Flow: Solve by Completing the Square
[Free Registration/Login Required] This flipchart explores the steps for solving quadratics by completing the square.
Stanford University
Quadratic Formula/explanation
A step-by-step explanation of how the quadratic formula is obtained from the general form quadratic polynomial.
Math Medics
S.o.s. Math: Quadratic Equations: Basic Definitions
This S.O.S. Math tutorial offers definitions and examples of quadratic equations and quadratic functions.
ClassFlow
Class Flow: Exploring Quadratic Functions
[Free Registration/Login Required] Use this interactive flipchart to allow students to explore quadratic functions in algebra.