## Quilts

Copy a quilt block made of 16 squares. Each block will have one of the four symmetry types: H, M, B, or S and you choose which you think it is.

## Random Sampling

Sampling can produce measurement bias. See if you can personally select a sample that is representative of a particular population.

## Reaction Time

You'll be challenged to test your reaction time under different conditions and then compare the results. You'll find out how processing in the brain changes reaction time under different conditions: being distracted, being presented with emotionally charged stimuli, or being faced with increasing complex tasks.

Learn the visual language of maps (perspective, symbols and data) and see how mapping techniques have changed over time. Practice looking at maps as historical artifacts.

## Reasoning About Fractions

Apply the reasoning and proof standard to a problem based on the Fraction Tracks game. Observe as students use a linear model as well as hands-on materials to solve the same problem.

## The Rectangle Method

One approach for finding area is to surround the shape with a rectangle, determine the areas of the rectangle and subtract the pieces of the rectangle that are outside the original shape. Use this geoboard to create shapes and determine their areas.

## Relationship Between Scientific Graphics and Text

In this activity, explore the important connection between graphics and text in science writing by annotating a graphic and text about asteroid impacts and mass extinctions on Earth.

## Repeating Decimal Rings

The process of converting fractions to decimals can help clarify the relationship between the two. Investigate the repeating parts that emerge when you expand sevenths and 13ths fractions into decimals.

## Report Your Sightings

Observe various migratory species (hummingbirds, butterflies, etc.) and report their sightings online. Share and review the sightings with other students/classrooms to track hemispheric migratory patterns.

## Representations of an Infinite Series

What are some different ways to represent the sum of consecutive powers of 1/2; that is, 1/2 + 1/4 + 1/8 + 1/16 + ..., etc? Explore physical, numeric, geometric and symbolic representations and consider how you represent math in your own mind.

## Representing Different Styles of Data

This activity explores how to interpret different styles of representing data, focusing on data related to the thinning ozone layer.

## Research Methods

Imagine you are a research psychologist. Learn about proposing a hypothesis, using the scientific method, collecting and analyzing data and respecting the basic rights of humans and animals.

## Resolution

Listen to an explanation about the resolution in Cinderella. Identify the story’s ending.

## Respond to Student Writing

Identify strengths and areas for improvement in an authentic piece of student writing. Provide enough feedback to help the student become a better writer but not too much to overwhelm him or her.

## Respond to Student Writing: Cell Phones

Use an interactive rubric to evaluate areas of strengths and weaknesses in a student's essay on cell phone use in schools. Then compare your responses to another teacher's.

## Respond to Student Writing: Skates 280

Use an interactive rubric to evaluate areas of strengths and weaknesses in a student's essay on an experience at a skating party. Then compare your responses to another teacher's.

## Respond to Student Writing: The Watch Glass

Use an interactive rubric to evaluate areas of strengths and weaknesses in a student's poem comparing school to a watch glass. Then compare your responses to another teacher's.

## Responding to Works of Art

Learn how to respond to artwork by describing, interpreting meaning and evaluating effectiveness of the piece. You can modify the technique for your students.

## Robots

The owner of a factory has two expensive robots to automate a manufacturing process. Use the topological concept of a configuration space to coordinate their actions and maximize their efficiency on the manufacturing floor.

## Rock Cycle Assessment: Test Your Skills

Test your knowledge of rocks and the rock cycle. Take this 15-question test, review your correct and incorrect answers, and print out your assessment.