 Teacher resources and professional development across the curriculum

Teacher professional development and classroom resources across the curriculum  MENU

## 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.

## 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.

## 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.

## Random Sampling

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

## 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.

## 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.

## 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.

## 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.

## Running a Function Machine

The connected machine is a single function that takes an input, runs it through the network inside and produces an output. You control a network of function machines along with the input and the operation performed by each machine to solve problems.

## Sampling Data

There are 20 chips in a container, some are red and some are blue. Take out a few chips and then, based on the chips selected, try to determine how many of each are in the container.

## Sampling the Electorate

As the pollster for candidate Higgins, you need to know how she is faring with different groups. Read her political profile, view the demographic profile of the city, decide on the groups to poll, review the results and learn about random sampling.

## Scaling the Area of a Community Garden

Calculate the area of a rectangle and a triangle as you change one or both of their dimensions. While looking at representations of several different rectangles and triangles, represent your findings in a table and determine if there is a pattern.

## Shadows

Can you judge an object by its shadow? Use your mental rotation skills to determine if a shadow can be produced by a particular shape.