## Timeline: Pre-Columbian America to 2005

This timeline gives a contextual view of major events from from Pre-Columbian America to 2005. Each period covers a unit in the America's History in the Making course.

## The Towers Problem

Build as many different looking towers as is possible, each exactly four cubes high using two colors of Unifix® Cubes. Convince yourself and others that you have found all possible towers four cubes high and that you have no duplicates.

## Tracing the Path

Draw arrows connecting the sources of energy to the receivers of energy. Remember that some sources of energy have more than one receiver and some receivers of energy have more than one source.

## Transform the Rock

There are five processes that can change rocks over time. Pick the process that has changed each rock from one type to another and then identify the process that cycles each rock from magma to rock and back to magma.

## Transforming a Circle

You can find the areas of different polygons by dissecting the polygons and rearranging the pieces into a recognizable simpler shape. Cut a circle into wedges and fit them together to form a crude parallelogram.

## Trigonomic Functions

Use a trigonometry calculator to explore the ratios of sides of a right triangle. Do the sine, cosine and tangent have maximum or minimum values?

## Tulip Gardens

Track tulip growth as the season changes from winter to spring. See how temperature, rainfall and sunshine affect growth and help scientists look for patterns of climate change.

## Tungurahua Timeline

The Tungurahua volcano in Ecuador has gone through a series of active and dormant periods. Follow the volcano's activity from 1773 to 2000, including a scene of an explosive eruption in 1999.

## A Typical Week

Explore several representations of how you spend your time during a typical week and compare them to those of another teacher. Which representations are easier to compare?

## Unit Prices

Work with widgets and milk cartons to think about unit pricing problems and reflect on the various strategies you used to solve these problems. Then create your own unit pricing problem.

## United States History Map

Become a geography whiz as you learn how the United States was settled. Discover how the continent was irrevocably changed by European colonization, the events that caused the wholesale displacement and decimation of the land's original inhabitants, and how the 50 states came to be formed.

## Units and Prefixes

Explore some common units and prefixes in the metric system. Then decide which metric units you would use to measure several displayed objects.

## Unity and Diversity

Analyze teaching strategies used in four classroom examples. Describe how the teachers incorporated themes of unity and diversity into their lessons and compare your answers to the sample answers provided.

## US History Map Assessment: Test Your Skills

Test how much you know about major U.S geographic features, Indian tribes, states and regions, European colonists and territorial expansion. View your correct and incorrect answers, and print out your assessment.

## Using Artifacts

View an engraving and two photographs from U.S. history. As you view these resources, think about what you can identify and interpret through the images, and what kinds of questions you might generate if you were using these images to teach your students.

## Using Hexominos to Manufacture Boxes

Which hexomino net wastes the least amount of paper and yields the most boxes per sheet? Comment on how concepts such as area, spatial visualization and relationships among geometric shapes are all involved in solving this problem.

## Using Your Day To Inspire Writing

Scroll through the events from a single day of a writer/teacher. Roll over each event to see how it sparked ideas for writing topics and genre(s).

## Valentines Cards

How many valentines are exchanged if each of your 24 students gives a valentine to everyone else in the class? Think about how you would solve a similar problem for a school of 1,000 students.

## Valuing Diversity in Learners

Study four types of learners (heritage language learners, those with learning disabilities, with different learning styles and in different levels)and the issues related to each. Read strategies of other teachers and describe strategies you might use.

## Variation in Estimates

A computer can perform random sampling and estimation faster than you can. Use the computer to help you estimate a penguin population from computer-selected random samples.