The Math League
The Math League: Ratio and Proportion
This tutorial provides definitions and examples of ratios and proportions and features comparing ratios and converting rates.
University of Cambridge
University of Cambridge: Maths and Sports: Drug Testing
The use of performance enhancing drugs is the dark side of sport, and there are stringent measures in place to try to screen athletes. But what's the likelihood that an athlete who fails a drug test has actually taken the banned drug?...
University of Cambridge
University of Cambridge: Maths and Sports: What's the Point of Squash?
Squash isn't an Olympic sport (yet!) but it has an interesting scoring system. If you reach 8-all in a game of squash, when should you decide to play to 9 points rather than 10? This activity is a starting point for mathematical...
CK-12 Foundation
Ck 12: Mutually Inclusive and Mutually Exclusive Events
[Free Registration/Login may be required to access all resource tools.] Learn about mutually inclusive and exclusive events in probability.
Khan Academy
Khan Academy: Markov Chains
The concept of modeling sequences of random events using states and transitions between states became to known as Markov Chains. Introduction to Markov chains. Created by Brit Cruise.
US Department of Education
Nces: Kids' Zone: Chances
Dice game allows you to see how increasing or decreasing the number of dice rolls affects an outcome.
University of St. Andrews (UK)
University of St. Andrews: History of Mathematics: Abraham De Moivre
This site contains biographical information and works of the mathematician Abraham DeMoivre.
University of St. Andrews (UK)
University of St. Andrews: Ludwig Boltzmann (1844 1906)
A very in-depth biography of this wonderful individual who had numerous successes, Maxwell-Boltzmann Distribution Curves included.
Other
Correlation Coefficients
This page provides a good discussion of correlation coefficients (r,) which indicate the "strength of the linear association between variables." Includes formulas and scatter plots. Some prior knowledge of statistics might be helpful.
Other
Estadistica
In Spanish. Overview of statistics and related concepts. Gives explanations, sample formulas and examples, as well as exercises for students to try (with link to solutions.)
Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Tables and Graphs
Six problems present various aspects of using and making tables and graphs to display statistics. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the "View...
ClassFlow
Class Flow: Donkey Derby Handling Data
[Free Registration/Login Required] Can you list all probabilities when two dice are thrown? Run your own race here and see which donkey wins.
That Quiz
That Quiz: Probabilidad
Test your knowledge of probability by taking this practice test. Five levels are provided and it also tracks the number of correct and wrong answers.
Other
Eduteka: Matematica Interactiva
Topics covered in this site are: concepts of numbers, geometry, algebra and statistics. This site has lesson plans, interactive activities and discussions.
Khan Academy
Khan Academy: Normal Distribution: Area Above or Below a Point
Use a z-table to find the probability of a particular measurement. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Math Planet
Math Planet: The Mean, the Median, and the Mode
Gain an understanding of how to find the mean, median and mode by viewing examples and a video lesson. [2:22]
Math Planet
Math Planet: Combinations and Permutations
Gain an understanding of combinations and permutations by viewing an example and a video lesson. [1:15]
Math Planet
Math Planet: Pre Algebra: Finding the Odds
Discover how to find the odds or chance of an event occurring by taking a look at an example and a video lesson.
Khan Academy
Khan Academy: Normal Distributions Review
Normal distributions come up time and time again in statistics. A normal distribution has some interesting properties: it has a bell shape, the mean and median are equal, and 68% of the data falls within 1 standard deviation.
Khan Academy
Khan Academy: Normal Distribution: Area Between Two Points
Use a z-table to find the probability that a particular measurement is in a range. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Other
Utah St. Univ.: Coin Tossing Applet
An interesting Applet that simulates the toss of a coin 100 times. A quick count of the results and an accompanying graph make this site useful for both teacher and student.
Other
Northern Michigan University: Stem and Leaf Plot
Site discusses how to use stem-and-leaf plots with an example and the steps listed for easy reading.
National Council of Teachers of Mathematics
Nctm: Figure This: Math Challenges for Families
Students, teachers, and parents alike will enjoy this challenging math site. It contains a clever brain teaser section plus creative problems related to algebra, geometry, measurement, numbers, statistics, and probability. A Spanish...
Annenberg Foundation
Annenberg Learner: Sampling the Electorate
As the pollster for candidate Higgins, you need to know how she is faring with different groups. Read her political profile, view the demographic profile of the city, decide on the groups to poll, review the results and learn about...