Math
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Online K-12 Education
Reviewed December 13, 2000 by Jawa, a reader from USA who is affiliated with the site. This site has hundreds of interactive math lessons with great graphics, animation and audio. Math courses range from kindergarten to high school including pre-algebra, algebra and geometry. There are three distinct designs addressing the needs of elementary, middle and high schools. Each lesson has exercises and quizzes that are scored and the progress is tracked so that parents can monitor the progress of their children. There are several fun educational activities such as hangman spelling game, interactive coloring and puzzles, and homework help. Free registration gives access to all lessons. Paid registration gives access to exercises/quizzes and scoring.
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Online Conversion
"Online Conversion is the most comprehensive of today’s calculator sites, covering over 5,000 units and 50,000 conversions. Some of the unique units include computer measurements (bit, byte, kilobyte, and so on), cooking (drop, dash and pinch), and acceleration (celo and decigal.) To use, select the units you want converted from and to (such as knot to mach) from the drop-down lists. Results are rounded to seven decimal places. In the Fun Stuff category, you’ll find Roman Numeral conversion, a Pig Latin translator, typing speed test and much more."
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Official U.S. Time
A Surfnetkids Honorable Mention site.
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No Matter What Shape Your Fractions Are In
"In a word, these colorful geometric puzzles and exercises for elementary and middle school students are just plain fun. My favorite is the interactive Pattern Blocks (you’ll find the What Fun link on the front page.) Don’t miss it! Oh, and did I mention they were educational too? Author Cynthia Lanius of Rice University explains it this way ""These activities are designed to cause students to think; they are not algorithmic. They do not say, ‘To add fractions, do step one, step two, step three.’ Students will explore geometric models of fractions and discover relations among them."""
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Multiflyer
Reviewed by Dan Perkins, a reader from Charles Town, West Virginia, who is affiliated with the site. "Multiflyer is a fun online game I developed to help anyone who is learning multiplication tables. It takes place in space and even includes learning about the planets. You can play it online, or register and receive a full downloadable version."
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Multiplication Rock
A Surfnetkids Honorable Mention site.
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Multiplication Tips
"To multiply by nine on your fingers, hold up ten fingers – if the problem is 9 x 8 you just put down your eighth finger and there’s your answer: 72. If the problem is 9 x 7 just put down your seventh finger: 63. "If you are multiplying 5 times an even number, halve the number you are multiplying by and place a zero after the number. Example: 5 x 6, half of 6 is 3, add a zero for an answer of 30." Toss your calculator. Learn these student-submitted tips for calculating times five, times nine and times eleven in your head. "
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Multiplication: An Adventure in Number Sense
"Join in on the conversation between a student ("There are too many multiplication facts to memorize.") and a mentor ("If you want to know the multiplication table from 1 to 10, you may want to memorize 13 facts, at most. There are very easy tricks that will let you get the rest of the facts as fast as if you remembered them.") You’ll learn which thirteen facts you need to memorize, and how to recall the rest of the multiplication table using fast mental arithmetic and number sense."
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Mudd Math Fun Facts
"Fun Facts from the mathematics department of Harvey Mudd College are tidbits designed to arouse mathematical ""curiosity and fascination"" and to show high-school and college students that there is more to math than calculus. Facts can be read randomly, or queried by subject (such as algebra, geometry or probability) and difficulty level. You can even submit your own fun fact for possible publication. For an example of one of the easiest facts, look up Mind-Reading Number Trick in the search box."
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Moon Phases
A Surfnetkids Honorable Mention site.
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