Quizlet offers a Solving Quadratic Equations by Factoring flash card set that comes with cards, a worksheet and customizable quiz. The cards can be used online with an audio component, as can the worksheet, or they can be printed with solutions. The site also has customizable quizzes that can be answered as multiple-choice, true or false, matching or written questions. The quizzes can be taken online or printed with an answer sheet. Quizlet also has 25 Quadratic Equations flash-card, worksheet and quiz sets available.
CoolMath has colorful tutorials online to help students learn to solve quadratic equations by factoring. Tutorials are given, then practice problems with explanations and answers are provided. CoolMath has a Quadratic Calculator on its site that allows students to enter a quadratic equation and the calculator will solve it. CoolMath also has an Algebra Cruncher game that generates an unlimited number of problems, with hints and answers for students. It includes solving quadratic equations by factoring, using the "square root trick," and the quadratic formula.
Quia's web site hosts a version of the game show Jeopardy! with questions about solving quadratic equations by factoring. Players choose from several categories at 100-500 point levels. The game can be played alone or as a two-player game. Students are given questions and must type their answers. Quia has several other games about factoring quadratic equations.
Discovery Education's MathWeb site hosts a page that will solve a quadratic equation by factoring it. Students enter a quadratic equation and the site factors it, explaining all the steps. MathWarehouse offers online tutorials for factoring quadratic equations and then prompts students to solve problems.