Browse Interactives

Decorative Boxes

Students need to cover 24 boxes with decorative paper. Observe as they use geometry and measurement to determine the area of one box in order to estimate the total amount of paper needed.

Discipline: Mathematics
Audience: Teacher

Determining Rotation Symmetry

Explore properties of rotation symmetry. Determine the angle of rotation for different images.

Discipline: Mathematics
Audience: Student

The Distance Formula

Plot points on a graph. Use the Pythagorean theorem to calculate the distance between them.

Discipline: Mathematics
Audience: Student

Division with Manipulatives

Area models offer a visual representation of mathematical operations. Use these models to perform multi-digit division.

Discipline: Mathematics
Audience: Student

Drawing a Box Plot

Learn how to represent the Five-Number Summary graphically using a box plot.

Discipline: Mathematics
Audience: Student

Equivalent Fractions

Explore equivalent fractions, and decide which of two classrooms is better at blowing bubble gum.

Discipline: Mathematics
Audience: Student

One way to solve a complicated problem is to solve a smaller version of the same problem. Without working out the larger problem, predict how many sheep will get shorn before impatient Eric, who is sneaking up in line little by little.

Discipline: Mathematics
Audience: Student

Even Data Sets

How do you find the median for an even numbers of noodles? Learn how in this three-noodle summary of twelve noodles.

Discipline: Mathematics
Audience: Student

Exploring Zero and Infinity on a Graph

Explore the number line and its elements through a graphic representation of an equation. Move along the curve of the graph of xy=12 to see how the values change as you vary x or y and consider what happens for negative values of x and y.

Discipline: Mathematics
Audience: Student

Factors

Explore the factors of numbers 2 to 36. Show how many factors each number has and identify which one are prime.

Discipline: Mathematics
Audience: Student

Factors of 24

Build rectangles that have an area of 24 square units and compile a list all possible factors of 24. Explain how you know that you have found all the possible factors.

Discipline: Mathematics
Audience: Student

Fitting Lines to Data

For a given set of data points, the line that minimizes the sum of the squared errors is the least squares line. Find the least squares line that best represents the height and foot length of 17 people in a scatter plot.

Discipline: Mathematics
Audience: Student

Five Noodle Summary

The Five-Number Summary divides ordered numeric data into four groups with each group having the same number of data values. You will create a five-noodle summary for two different sets of noodles.

Discipline: Mathematics
Audience: Student

Fractions With Cuisenaire Rods

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

Discipline: Mathematics
Audience: Student

Frequency Bar Graphs

Line plots are good for small amounts of data while frequency bar graphs are better for large amounts. Observe how to transition from line plot to frequency bar graph.

Discipline: Mathematics
Audience: Student

From Corner to Corner

Measure the lengths and diagonals of three squares with a ruler. Look over your measurements and try to come up with a rule of thumb for estimating the length of a diagonal if you know the length of a side.

Discipline: Mathematics
Audience: Student

Geo-Logo

Enter commands to direct your drawing tool to create different shapes. Reflect on the relationship between interior, exterior and central angles.

Discipline: Mathematics
Audience: Student

Guess My Button

Practice classification/pattern recognition skills by guessing which button out of sixteen the computer has chosen. Go through a series of online questions about the buttons that differ in size, color, shape and number of holes to determine the answer.

Discipline: Mathematics
Audience: Student

Guess My Rule

Someone makes up a mystery algorithm and keeps it secret. With the help of the function machine, try to discover the algorithm with as few guesses as possible.

Discipline: Mathematics
Audience: Student

Histogram

Review the transitions between various graphical representations of data and discuss the advantages of a histogram have over a stem and leaf plot. Also consider the disadvantages of a histogram.

Discipline: Mathematics
Audience: Student