CoolMath offers free ninth grade pre-algebra lessons with practice questions on its website. Colorful graphics clearly explain work online in the areas of factors and primes, greatest common factors and lowest common denominators, decimals, exponents, percents, fractions, integers and order of operations. Beginning tutorials are available in the subjects of polynomials, radicals and square roots, solving equations and graphing. The tutorials include lessons, followed by problem examples with step-by-step answers. CoolMath also generates endless Algebra Crunchers problems on its site, allowing students to practice skills learned, with explanations, hints and solutions provided.
Quizlet's website offers free flashcard sets which include worksheets and quizzes which can be used online or printed for later use. Quizlet has more than 600 flashcard sets for a wide range of pre-algebra topics such as geometry terms and integers and order of operations. These flashcard sets can be used to teach ninth graders pre-algebra topics through the worksheets with audio which are provided with each flashcard set, and the flashcards have audio as well. Quizzes can be customized for true or false, multiple choice, matching or written answers with immediate scoring online or the quizzes can be printed out with an answer sheet. You can also make your own flashcard sets on this site for study of specific areas.
The National Aeronautics and Space Administration (NASA) Space Math website incorporates lessons about space and physics into lessons about pre-algebra through calculus. Students can use geometry to calculate the last total solar eclipse ever or chart magnetic data on a bar chart following a storm using lesson plans provided on the NASA site.
Shmoop's pre-algebra web pages include introductions to the topics, a selection of different activities and lessons available related to a specific topic, a vocabulary list and web resources for further study. Shmoop's basic statistics and probability page offers 14 learning activities in the topic range, such as stem and leaf plots, histograms, box and whisker plots and making conjectures. Twenty-one web resources are also listed for this topic, offering interactive box plotters and bar graphers, histogram tools, virtual coin tosses and spinners, a random drawing tool and a racing game with one die. Shodor is a free educational site which recently won a Shmoop Award for the best on the web in the area of pre-algebra. Their extensive offerings of pre-algebra lessons can be found on their website.
High School Tutorials offers three online pre-algebra textbook tutorials. The textbooks are like standard math books, but with a virtual component. The pages include step-by-step instructions read to students with an audio component and animated problems are solved online while explained, in this virtual setting.