Download these free worksheets to sharpen your skills with statistics and probability. Sheets focus on collecting and organizing data, measures of central tendency (mean, median, mode, and range), and probability.

This 8-minute video lesson takes some problems from CK12.org to provide Z-score practice. [Statistics playlist: Lesson 31 of 85]

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This lesson models how to construct and interpret a confidence interval in a problem about Instagram followers among teens. Includes downloadable study guide with exercises - guide also covers other topics. [14:30]

This lesson models how to construct and interpret a confidence interval in a problem about teens' use of Snapchat. Includes downloadable study guide with exercises - guide also covers other topics. [10:31]

This lesson teaches students how to identify the incorrect use of confidence intervals in a news article. Includes downloadable study guide with exercises - guide also covers other topics. [6:18]

Explains the features of dot plots, when they are used, and the statistical vocabulary that is used when describing them. Also models how to compare and contrast distributions. Includes downloadable study guide with exercises - guide also covers other topics. [17:50]

This lesson demonstrates how to interpret a confidence interval once you have calculated it. Includes downloadable study guide with exercises - guide also covers other topics. [9:56]

Explains the features of stemplots, or stem-and-leaf plots, and the statistical vocabulary that is used when describing them. Also models how to compare and contrast distributions. Includes downloadable study guide with exercises - guide also covers other topics. [15:02]

This lesson discusses the advantages and disadvantages of using different types of graphs to display data, such as pictographs, line graphs, and bar graphs. [3:08]

This lesson discusses how statistics can be used as supporting details. This tutorial shares a short audio lesson [05:16] and supplemental notes with the lesson's content.

A lesson with audio discussing how analogies can be used as supporting details. [4:00]

This lesson focuses on using statistics as supporting details. It explains why statistics make powerful supporting details, however, these can be skewed to show different outcomes. It suggests looking carefully when using statistics to be sure they are not biased. This information is offered in text and in audio formats. CCSS.ELA-Literacy.CCRA.W.1, W.11-12.1b claims/evid/aud, W.11-12.2b Topic/support/audience. CCSS.ELA-Literacy.WHST.6-8.1.b

This U.S. Census Bureau Web site has two population clocks with notes available. One clock shows the population increase for the United States. The other shows the world population increase.

A listing of all sorts of available reports on bismuth. Great resources for students at many levels.

Students build on their existing air quality knowledge and a description of a data set to each develop a hypothesis around how and why air pollutants vary on a daily and seasonal basis. Then they are guided by a worksheet through an Excel-based analysis of the data. This includes entering formulas to calculate statistics and creating plots of the data. As students complete each phase of the analysis, reflection questions guide their understanding of what new information the analysis reveals. At activity end, students evaluate their original hypotheses and “put all of the pieces together.” The activity includes one carbon dioxide worksheet/data set and one ozone worksheet/data set; providing students and/or instructors with a content option. The activity also serves as a good standalone introduction to using Excel.

What are the probabilities of winning at tennis? This challenging activity is designed to be accessible to students of A-Level Maths (grades 10, 11, and 12).

Use our interactivity to simulate picking up a bow and some arrows and trying to hit the target a few times. Can you work out the best settings for the sight? This activity gives an opportunity to gather and collate data, and to test hypotheses, and is designed to be accessible to younger secondary maths students (grades 5, 6, 7, and 8).

Sports statisticians, trainers and competitors create graphs, charts and diagrams to help them to analyse performance, inform training programmes or improve motivation. This activity encourages students to consider and analyse representations of data from a number of sports, and to discuss whether the right representation has been chosen for the purpose. It is aimed at secondary students (Key Stages 3 and 4).

Does weight give shot putters an advantage? This activity encourages students to engage in statistical analysis, and is aimed at GCSE and A-level students (Key Stages 4 and 5).