Rene´ Decartes is the father behind his offspring, the coordinate system, useful in algebra and geometry. If coordinates are just not making useful sense to you in class, try out this instructive tutorial that shows you how to coordinate geometry's lines and points. This four-step lesson first introduces you to the apocryphal story of how Descartes came up with his idea. The second step shows how to place coordinates on a grid, and how to write an ordered pair. Once the foundation is laid, you practice with some problems, and finally you'll be able to see how you really score on a brief test. Included are the vocabulary words that you'll need to understand the concept and share in your next upcoming class.
This game helps build memory skills by exercising that part of your brain that requires concentration and attention to detail. Think of it as a muscle and by picking incorrect numbers you will strengthen the possibility of picking the correct one. You have choices of choosing numbers between 1 and 10, 1 and 100, and -1000 and 1000. As you guess, a chart shows whether your guess is too high or too low. By knowing that, you can focus in on the correct number. The catch is that you have only a certain number of guesses. If you choose to play the hard way, you’ll find out if your guesses are too high or too low, but you’ll have to remember what numbers you've picked.
What a great online subtraction game! Do you have a student who loves the thrill of a video game? Then he or she is going to love the excitement of this enrichment website. Count on Convict has an escaping convict, flashing search lights, and a police siren that sounds when you've answered the problem correctly. The game teaches children to find the difference when subtracting by using a number line. Figure out the distance the convict goes from his jail cell by answering the subtraction problem. In steps you move from the subtrahend, the number being subtracted, to the next 10 that you need to borrow from. Write your answer, check it, and catch the criminal. There is even a help button should you run into problems.
Can you imagine how hard it was to carry around enough coinage to purchase a big-ticket item prior to 1862? The only legal tender backed by the United States up until that time was in the form of coins. In February, 1862, as a way to finance the Civil War, the Legal Tender Act was passed, and the first paper money, the “Greenback,” was issued on March 10, 1862. This site from NOVA explores how the Treasury Department and Secret Service strive to keep our paper money hi-tech enough to thwart counterfeiters. After you’ve reviewed how a 100 dollar bill is made, try your hand at spotting a bogus bill.
Having an issue understanding that last lesson on vectors? Here's a great little game that allows you to move a boat around the water by changing the boat’s speed or the water current’s speed. In the first game you steer a boat through the water to land on an island in the water. The second game is more difficult because you need to intercept a moving target, a school of fish. The third game contains
qualities of the first two. The instructions are clear and there are suggestions on how to change vectors to get different results. You'll be ready for that next test!
Help your child or students understand the broad uses of trigonometry as a tool in
problem solving. With this lesson students will reinforce their understanding
of identifying equivalent trigonometric expressions. Included is a downloadable trig puzzle that can be used in small groups to match equivalent
expressions. There are also two activity sheets that address applying
trigonometric solutions to specific situations. Suggested answers are given,
but answers may vary depending on how students interpret the problems.
The latest “fall back” at 2:00 a.m. on November 3 marked the end of daylight
saving time for this year. This exhibition from Smithsonian Institution’s National Museum of American History examines the relationship Americans have had with time and clocks over the past three centuries. The sections of this exhibition contain thoughtful discussion of the measurement and use of the passing of time over several eras of American History. It also includes many artifacts dealing with time pieces, time-saving efforts, and time-planning.
Give your students these math tool chests to practice lots of different math
skills. There are eleven boxes filled with ways to review various
mathematical concepts. Work with number lines, place value, and money. The
spinner and coin toss chests focus on probability. Review attributes and
patterns, as well as fractions, tables, and graphs. Some of the boxes offer two
levels of practice, and there are several functions to use with each chest, such
as an eraser, camera, paint, a calculator, and a way to print out what has been
Sales pitches can persuade even the most remote consumer to run out and purchase the latest equipment. If you want your students to be smart consumers than have them work through this site from PBS to learn how shop consciously. Several games help users hone their buying skills. The emphasis playing the Shopping Bag game is on reading labels, especially the fine print and ingredients. What's the difference between designer outfits and those which are more of a bargain? Find out at Don't Buy It!
Get your golf groove on and play on this virtual course where you have to estimate the angle you want to hit the ball and how far you want to hit it. There are sand
traps, water hazards, and trees to avoid. You’ll be getting a good work-out of
your skills in estimating length and angles, fractions, decimals, and the use of
the virtual ruler and protractor. Your goal, as with any golfer, is to beat
par. Unlike the real game of golf, you won’t have to yell “fore” when you hit
an errant shot.