Ratios

Online

NCTM: Fraction Model Applet

http://my.nctm.org/eresources/repository/2071/applet/FractionPie/index.html

A fraction exploration tool. Use the arrows or sliders provided to create your fraction (top slider is for the numerator). Also choose from different models to represent the fraction.

NLVM: Percentages

http://nlvm.usu.edu/en/nav/topic_t_1.html

This is a very simple activity to practice percentages. 3 boxes are provided: Whole, Part, and %. Fill in two, and choose Compute. The program will tally the missing field and change the graphic accordingly. Displays the answer and how to work the problem to the right of the graphic.

NLVM: Pie Chart

http://nlvm.usu.edu/en/nav/topic_t_5.html

The NLVM: Pie Chart is a great way to show parts to a whole. Users fill in the category information and a number/total for each, and the manipulative generates a pie chart with the percentages each number/total represents in respect to the whole.

PBS Teacherline: Comparing Mixtures

http://teacherline.pbs.org/teacherline/resources/activities/mixing_orange_juice/comparemix/comparemix.htm

This is a fun activity that comes with an applet (REQUIRES SHOCKWAVE PLAYER). An online worksheet is provide, giving instructions on mixing two separate sets of orange juice concentrate, and using the applet to simulate the mixing the concentrate and water. Users then have to decide which one taste more "orangey" based on the mixtures they performed. Great connection to real world ideas.

ExploreLearning: Beam to Moon (Ratios and Proportions)

http://www.explorelearning.com/index.cfm?method=cResource.dspView&ResourceID=98

This activity has the user enter their weight, and then drop one of the items from the side bar into the unused scale. Then take that same item and drag it into the corresponding scale on the Moon (or other planet) to find out the ratio. Use this proportion to find the user's weight on the Moon (or other planet). Use the Beam Away button to check your answer.

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