Poet. Orator. Actress. Activist. Writer. Singer. Phenomenal Woman. These and many more superlatives are used to describe the incomparable Maya Angelou. Gone too soon in 2014 at the age of 86, Dr. Angelou's legacy will live on through the words she used to eloquently, powerfully, and honestly express emotions, capture experiences, and spread hope.

Learn about position, velocity, and acceleration in the "Arena of Pain". Use the green arrow to move the ball. Add more walls to the arena to make the game more difficult. Try to make a goal as fast as you can.

This lesson unit is intended to help you assess how well students are able to: Calculate the mean, median, mode, and range from a frequency chart; and to use a frequency chart to describe a possible data set, given information on the mean, median, mode, and range.

This lesson unit is intended to help teachers assess how well students are able to: make sense of a real life situation and decide what math to apply to the problem; understand and calculate the conditional probability of an event A, given an event B, and interpret the answer in terms of a model; represent events as a subset of a sample space using tables, tree diagrams, and Venn diagrams; and interpret the results and communicate their reasoning clearly.

This unit is a study of the shifts in narrative voice and literary genres that Melville makes throughout Moby-Dick. It serves to introduce students to several unique features of the novel without demanding as much class time as would reading the entire text. The lessons comprise a series of close readings of passages from the novel.

Insert channels in a membrane and see what happens. See how different types of channels allow particles to move through the membrane.

Insert channels in a membrane and see what happens. See how different types of channels allow particles to move through the membrane.

Christine Sleeter and Carl Grant wrote this lesson to encourage students to explore policies and attitudes about Mexican and Mexican American laborers in the U.S. and develop informed personal perspectives of the United States-Mexico border and undocumented Mexican immigrants.

How do microwaves heat up your coffee? Adjust the frequency and amplitude of microwaves. Watch water molecules rotating and bouncing around. View the microwave field as a wave, a single line of vectors, or the entire field.

How do microwaves heat up your coffee? Adjust the frequency and amplitude of microwaves. Watch water molecules rotating and bouncing around. View the microwave field as a wave, a single line of vectors, or the entire field.

This lesson encourages close study of Wood's painting, American Revolution primary sources, and Longfellow's poem to understand the significance of this historical ride in America's struggle for freedom. By reading primary sources, students learn how Paul Revere and his Midnight Ride became an American story of patriotism.

The activities in this lesson invite students to focus on the characters from A Midsummer Night's Dream, to describe and analyze their conflicts, and then to watch how those conflicts get resolved.

This lesson unit is intended to help teachers assess how well students are able to: Understand conditional probability; represent events as a subset of a sample space using tables and tree diagrams; and communicate their reasoning clearly.

This lesson unit is intended to help teachers assess how well students understand conditional probability, and, in particular, to help teachers identify and assist students who have the following difficulties: representing events as a subset of a sample space using tables and tree diagrams; and understanding when conditional probabilities are equal for particular and general situations.

This lesson unit is intended to help teachers assess how well students are able to: interpret a situation and represent the constraints and variables mathematically; select appropriate mathematical methods to use; make sensible estimates and assumptions; investigate an exponentially increasing sequence; and communicate their reasoning clearly.

This lesson unit is intended to help you assess how well students are able to: interpret a situation and represent the variables mathematically; select appropriate mathematical methods; interpret and evaluate the data generated; and communicate their reasoning clearly.

This lesson unit is intended to help you assess how well students use algebra in context, and in particular, how well students: explore relationships between variables in everyday situations; find unknown values from known values; find relationships between pairs of unknowns, and express these as tables and graphs; and find general relationships between several variables, and express these in different ways by rearranging formulae.

How did scientists figure out the structure of atoms without looking at them? Try out different models by shooting light at the atom. Check how the prediction of the model matches the experimental results.

What determines the concentration of a solution? Learn about the relationships between moles, liters, and molarity by adjusting the amount of solute and solution volume. Change solutes to compare different chemical compounds in water.

Discover what controls how fast tiny molecular motors in our body pull through a single strand of DNA. How hard can the motor pull in a tug of war with the optical tweezers? Discover what helps it pull harder. Do all molecular motors behave the same?