## Spelling Bee

Contestants in grades 1-8 will listen to three stories, one at a time, and then spell words from each story. Students in high school will listen to separate sentences and then spell the words from each sentence.

## Spiraling Content Across Grade Bands

Read a lesson description from each grade band (elementary, middle, high school) and adapt the content from that grade band to the other two. Choose the same language and/or culture as the sample descriptions or one your are more familiar with.

## Stellar Spectra

When the light of a star passes through a spectrograph, elements of that star reveal a specific signature. Compare the spectra of four elements and a star to identify which elements you can detect in the star's atmospere.

## Storm Chaser

The Storm Prediction Center has issued a tornado warning. Do you have what it takes to be a storm chaser?

## Story Weaver

Reflect on a medieval tapestry and write a story about what you think is going on. Read stories that other site visitors have written about the tapestry in the Middle Ages.

## Subdividing Area

To find the area of a shape, 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.

## Symbolic Monarch Butterfly Migration

Join the celebration by creating paper butterflies that will migrate to their counterparts in Mexico for the winter. Children in Mexico who live beside the monarch's winter sanctuaries send them north in the spring.

## Symmetry

Observe the parameters for symmetry groups using common motions, such as rotation and reflection. Experiment with wallpaper patterns to learn about requirements of a group.

## Syntax Store

The colors listed in the boxes represent different parts of speech: noun, verb, adjective, adverb, etc. Figure out which colors represent which part of speech and then use the colors to create proper sentences.

## Tangram Puzzle

Move, rotate and flip seven shapes to form a square. As you work, think about the geometry connections included in the task of making this tangram square.

## Taxicab Treasure Hunt

To find a hidden treasure use taxicab geometry, a special kind of geometry that counts in city blocks. Pick an intersection, ask the computer how far it is to the treasure and get the distance using taxicab geometry.

There are many sources of variation in data, including random error and bias. Observe the difference between error and bias in this line matching exercise.

Explore the concept of slope. Ask yourself why the slope between pairs of points would change or why it would stay the same.

## This Just In

Different forms of media can present different views of the same story. See how your point of view might change as you read an article, watch a news clip and read an online article about the same event.

## Three-Noodle Summary

Practice locating the median for odd and even data sets. Consider the information you can glean from a set of data even if you only have Min, Med and Max.

## Tile Patterns

Drag tiles onto the grid in the pattern dictated by n^2+1. Write a function rule to express the total number of tiles you need to build the nth term.

## Timeline: Global Politics Recap

Reveal key foreign policy decisions through U.S. history. Select “You Decide” to test your knowledge.

## Timeline: History of Psychology

Learn about the historical foundations of contemporary psychology. Use the timeline to explore key events, publications, and perspectives that have shaped psychology from the late 19th century to the present.