 Teacher resources and professional development across the curriculum

Teacher professional development and classroom resources across the curriculum  ## I Took a Trip on a Train

You took four snapshots of some geometric shapes that you saw on your train trip around a circular track. You dropped the pictures and got them mixed up, and now you must imagine your trip to put them back in order.

## Inscribed Angles

Study inscribed angles in semicircles and quarter-circles. What conjectures can you make about the measure of an inscribed angle in semi- or quarter-circles? View non-Flash version.

## Limerick Factory

A limerick is a very funny piece of nonsense verse with its own special pattern of rhyme and rhythm. Use this tool to choose phrases to create your own limerick that follows the pattern.

## Line Plot Representations

Create line plots that have a mean of 5 but different deviations from the mean. Notice that the total deviation above the mean must equal the total deviation below the mean.

## Making a Line Plot

Practice creating a line plot. Use raisin counts for 17 boxes of raisins to graph the distribution of raisins per box.

## Making a Stem and Leaf Plot

A line plot may not be a useful graph for investigating variation so we must come up with a new representation based on groups of data. Construct a stem and leaf plot from a set of 26 data values.

## Making a Tree Diagram

A tree diagram is a helpful tool for determining theoretical or mathematical probabilities. Toss a coin and watch as branches represent a toss of either head or tails.

## Measuring Ant Tunnels

Students have used three non-standard measuring tools to estimate the length of an ant tunnel. Think about the problem-solving aspect of this activity as you compare their estimates.

## Measuring Short-Term Recall

Compare your recall of a list of non-words versus a list of words in timed sessions. Consider whether or not there might be bias in your experimental design.

## Measuring Steepness

Does the ratio of height to distance and the angle of elevation change as you move a ladder? Identify any patterns that exist between the height-to-distance ratios and the angles.

## The Median

Determine the median of eleven noodles. Consider what you would or would not be able to tell about the other noodles if you could only see the median noodle.

## The Midline Cut

You can cut geometric figures into pieces that you can rearrange to form different geometric figures. Show how the midline cut of any triangle can be used to form a parallelogram. View non-Flash version.

## Modeling Fractions With Cuisenaire Rods

Learn how to represent fractions with Cuisenaire Rods. Use these rods to perform operations with fractions.

## Ms. Anwar's Backyard

Use the slider on the graph to see all possible shapes of Ms. Anwar’s 2,000 sq. ft. backyard. Come up with an equation relating the length (x) and the width (y).

## Multiplication with Manipulatives

Area models can be used for many types of multiplication problems. Work with manipulatives to create area models for some multi-digit multiplication.

## Mystery Operations

The computer makes up a mystery operation and you have to figure out what it is. Keep entering pairs of numbers for the computer to calculate and try to find the pattern in the answers the computer gives until you think you know what's going on.

## Name That Function

Chart graphs of three equations. State whether each graph is quadratic, exponential or linear and explain your reasoning.

## Nonstandard Units

Use the set of three triangles to build each of the outlined polygons. Then use the triangles to determine the area and perimeter of each polygon.

## Operations in Base Four

Strengthen your understanding of place value by looking at systems based on numbers other than 10. Work with manipulatives to calculate base four addition and subtraction problems.

## Ordering a Stem and Leaf Plot

Stem and leaf plots are a method for showing the frequency with which certain classes of values occur. You will create an ordered stem and leaf plot.