## 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.

## Metronomes

Compare the ticking of a metronome to a sine wave. Use interactive metronomes to explore the phenomenon of spontaneous synchronization.

## 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. Anwarâ€™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.

## Networks

Learn about the different mathematical tools used to analyze and describe networks. Practice building networks that meet specific criteria.

## 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.

## Numbers in Nature

Many Renaissance artists and architects used the concept of the golden mean which was thought to be visually pleasing. An Italian mathematician developed a series of numbers related to the golden mean; see if you can detect the pattern.

## 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.

## Ordering Hats

Click through each representation to see how the display of relative frequency relates to the display of cumulative frequency and their corresponding histograms. Examine how each method is useful for summarizing the variation in numeric data.

## Organizing Data in a Stem and Leaf Plot

A stem and leaf plot is a graphical representation for investigating variation. You will convert an ordered stem and leaf display grouped by tens into an ordered display grouped by fives.

## People Patterns

Observe a line of people, discover a pattern and figure out who should come next. See if you can complete a pattern of 10 people before the penalty word "Pattern" is spelled out.

## The Perpendicular Bisector

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