edited by
Robert Panoff
published by
the Shodor Foundation
supported by
the National Science Foundation

This unique simulation for grades 6-9 provides hands-on practice in exploring mean, mode, and median. It features an interactive Java graphing applet that allows users to add/remove boxes from an axis with a given range. Click above the x axis to "plop" blocks into the desired columns, then watch as the applet displays pointers indicating mode, mean, and median. Students can also increase/decrease the range of values or input data in a statistical panel to practice constructing computer-generated graphs.

This resource is part of CSERD (Computational Science Education Reference Desk), a portal of the National Science Digital Library. The Interactivate collection contains more than 200 standards-based activities, many of which have been classroom tested.

Please note that this resource requires
Java Applet Plug-in.

6-8: 9B/M3. Graphs can show a variety of possible relationships between two variables. As one variable increases uniformly, the other may do one of the following: increase or decrease steadily, increase or decrease faster and faster, get closer and closer to some limiting value, reach some intermediate maximum or minimum, alternately increase and decrease, increase or decrease in steps, or do something different from any of these.

9-12: 9B/H4. Tables, graphs, and symbols are alternative ways of representing data and relationships that can be translated from one to another.

11. Common Themes

11B. Models

6-8: 11B/M2. Mathematical models can be displayed on a computer and then modified to see what happens.

12. Habits of Mind

12B. Computation and Estimation

3-5: 12B/E9. Use appropriate units when describing quantities.

6-8: 12B/M4. Find the mean, median, and mode of a set of data.

6-8: 12B/M6. Insert instructions into computer spreadsheet cells to program arithmetic calculations.

%0 Electronic Source %D 2009 %T CSERD Interactivate: Plop It! Grapher %E Panoff, Robert %I Shodor Foundation %V 2015 %N 25 April 2015 %9 application/java %U http://www.shodor.org/interactivate/activities/PlopIt/

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This Java-based simulation provides practice in constructing and reading bar graphs. Use the parameters provided in the applet or input your own data sets. Includes lesson plan and teaching tips.