## Periodic Table Assessment: Test Your Skills

Test your knowledge of atoms, orbitals, periods/groups, characteristics of families, isotopes and relative mass. Take this 39-question test, review your correct and incorrect answers, and print out your assessment.

## The Periodic Table

Go through the Periodic Table piece by piece and learn how it works. Also, figure out how and why elements interact to make the world you see around you.

## The Perpendicular Bisector

Watch as the triangle is reflected over the perpendicular bisector. Practice reflecting other figures.

## Personal Reading and Writing Inventory

Answer questions about your reading and writing preferences. Get feedback on how to add more writing to your life, in and outside of school.

## Placing Artifacts in Time

This interactive focuses on the concept of Chronological Thinking. Using the example of Pocahontas, explore how historical representations change over time, and often reflect the period in which the representation was created.

## Planning a Weekly Writing Schedule

Consider a week in your classroom, record instances when your students are writing and find additional places to fit writing into your teaching. See a sample of one weekly schedule where writing has been incorporated across the curriculum.

## Plate Interactions Challenge

Identify real-world cases of boundary interactions and predict the most likely future geologic outcomes. In the lightning round, unscramble four geologic terms

## Plates & Boundaries Challenge

Place the names of fifteen tectonic plates on the map. Then identify the type of boundary (convergent, divergent or transform) between several of these plates.

## Playing with Quadperson

Compare the effects of relative and absolute changes on a picture. Watch what happens to a Quadperson (a drawing of a face made of quadrilaterals) if every line were made half as long or made a half-inch shorter.

## Plot Plans and Silhouettes

Plot out a three-dimensional structure based on two-dimensional silhouettes. Look at the front and side view of figures and use a table to plot out the dimensions that mathematically represent the figures.

## Polygon-Classification Game

Click all the polygons to see which Venn diagram circle they belong to. Then try to determine the correct labels for each of the circles. View non-Flash version.

## Powerful Teaching and Learning

Read the description of each segment, then identify up to three elements of powerful teaching and learning best represented in the segment. Once you've identified the elements, explain your answers.

## Practice Conversion Problems: Multiple Conversion Factors

If you don’t know the conversion factor between a metric and a British unit, use the conversion factors you do know even though this may require more than one conversion step. Practice conversion problems with multiple conversion factors.

## Practice Conversion Problems: Two Conversion Factors

If you don’t know the conversion factor between a metric and British unit, use the factors you do know even though this may require more than one step. So if you need to go from meters to inches start with meters to feet and then convert feet to inches.

## Problem: Cystic Fibrosis

Explore the concept of genetic inheritance. Learn how to calculate the probability that cystic fibrosis will be inherited using the Punnett square.

## The Producer

Help a fictional producer balance a tight budget with his desire to make a successful, critically acclaimed film. Decide on personnel (screenwriter, director, cast), location, special effects and marketing while always keeping the budget in mind.

## Puerto Rico

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

## Put Your Money to Work

One way to be sure you'll have enough money to live comfortably when you retire is to put your money in a savings account where it will collect interest. Find out how simple and compound interest can help your money grow and calculate your own savings.

## Quick Images

Stretch both your visualization and drawing muscles. View a shape for three seconds and then try to draw it from memory. View non-Flash version.

## 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.