## Finding the Area of Dot-Paper Shapes

Practice two different methods to calculate the area of complex shapes. As you work, think about how you are approaching it, what difficulties you are encountering, and how you would communicate your thinking to others.

## 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.

## 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.

## Five-Question Survey: What are your ideas about basic astronomy?

Find out your or your students' understanding of astronomy. Afterwards you can see how others answered the questions.

## 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.

## 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.

## Frosted Cube-Cake

Imagine a cake shaped like a cube that is frosted on all six sides and will be cut into smaller cube-shaped pieces. Make predictions about the number of pieces and the amount of frosting on each piece of cake using the table to check your predictions.

## Fun House Mirrors

Explore the effect of concave and convex mirrors. Combine concave and convex mirrors to design a fun house mirror that will create the distorted pictures of Melissa and Sam.

## Galton Board

Use the Galton board to validate the Law of Large Numbers. Compare experimental and theoretical results to illustrate the Central Limit Theorem.

## Grade 2 Spelling Bee

Read and listen to stories with some words left blank. Fill in the blank words, check your score and get correct spelling for the words you missed.

## Genetic Engineering: Translating an mRNA Sequence

Translate an mRNA sequence into an amino acid chain using a codon chart. Then match each codon with the correct amino acid.

## The Genetics of Resistance to HIV Infection

Explore the relationships between viruses, cells and the immune system, and the role of genes in disease resistance. See how mutations in an HIV receptor confer relative resistance to infection. View non-Flash version.

## Genetics: Complex Inheritance Patterns

Our blood types are transmitted through multiple allelic inheritance. Identify the antigens and antibodies of the four different blood types: A, B, AB and O.

## Genetics: Sex Linkage

Some traits, such as colorblindness, are related to gender. Complete a Punnett square showing the possible genotypes of children born to a colorblind mother and a father with normal vision.

## Geo-Logo

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

## Geologic Timeline

Test your knowledge of major events (formation of the solar system, first appearance of water, etc.) in geologic history. Afterwards put the events in the correct order on the timeline.

## Geometry 3D Shapes

Learn about several three-dimensional geometric shapes and the terminology used to describe them. Learn how to calculate their surface area and volume, and explore their mathematical properties.

## Geometry 3D Shapes Assessment: Test Your Skills

Test your knowledge of polyhedra, prisms, pyramids, volume, surface area, Eulerâ€™s Theorem and platonic solids. Take this 39-question test, review your correct and incorrect answers, and print out your assessment.

## Grade 1 Spelling Bee

Read and listen to stories with some words left blank. Fill in the blank words, check your score and get correct spelling for the words you missed.

## Grade 3 Spelling Bee

Read and listen to stories with some words left blank. Fill in the blank words, check your score and get correct spelling for the words you missed.