## Accuracy vs. Precision

Measure the length of the notepad and desk in millimeters and centimeters and their mass in kilograms and grams. Notice how the precision and accuracy differ for each measuring device.

## Affirmative Action

Your new faculty advisory board just voted to change your university's admission policy. As dean of admissions, do you agree with the change that requires admission officials to meet enrollment quotas based on race?

## Alien Eyes

Explore parallax which causes each of your eyes to produce slightly different images. Then imagine yourself an alien and try to predict which images each of your four eyes see.

## American Passages Slideshow

Create multi-media presentations in response to writing assignments and close reading activities, by pairing audio and visual artifacts from a database of 3000 items.

## American Robin

Observe robins and report their sightings online. Share and review the sightings with other students/classrooms to track hemispheric migratory patterns.

## Amusement Park Physics

Are you really in danger when you are taking those hairpin turns and death-defying loops on a roller coaster? Discover how amusement park rides use the laws of physics to simulate danger, while keeping the rides safe.

## Amusement Park Physics (Non-Flash Version)

Are you really in danger when you are taking those hairpin turns and death-defying loops on a roller coaster? Discover how amusement park rides use the laws of physics to simulate danger, while keeping the rides safe.

## Applied Genetic Modification

Explore practical uses of genetic engineering techniques to generate a plant that produces a hepatitis B protein for potential vaccine use. Examine the use of restriction enzymes for cloning and plasmid mapping. View non-Flash version.

## Area and Perimeter

Create several rectangles with areas of 16 square units and calculate the perimeter. Predict how the length and width of the rectangle affects the perimeter.

## Area Model for Multiplication

Area models offer a visual representation of mathematical operations. Here you will use area models to multiply and reduce fractions.

## The Area Model

Use area models to find either the greatest common factor or the least common multiple of two numbers.

## Argentina

Practice some of the vocabulary and grammar covered in the Argentina episodes of Destinos.

## Arm Span and Height Measurements

Measure your arm span and height. See how your measurements compare to others when your data is added to a data table and corresponding scatter plot.

## The Art of Creating a Poll

You are the head of the Public Relations committee for your hometown Waste Removal Department. Create a poll for your department to find out how the public feels about waste incineration.

## Balancing Excesses and Deficits

Create a line plot [with dots] to represent stacks of coins. Then rearrange the dots to form different line plots and watch what happens to the mean.

## Bald Eagles

Track bald eagle migration. Report your sightings and observations to the bald eagle tracking map.

Travel back to the Renaissance period as a Portuguese spice trader with a large sailing ship. Success brings riches, failure brings ruin, so carefully decide which route, crew size, and goods to trade, and where to stop along the way.

## British and Metric Conversions

Learn to convert measurements from metric to English and vice versa, by learning the symbols used in both systems for properties such as mass, length, volume, and temperature.

## Browse Artwork

Take a thematic approach to art history and appreciation. Use this tool to browse through 223 pieces of artwork by theme, period, region or medium.