Is it a tumor? Magnetic Resonance Imaging (MRI) can tell. Your head is full of tiny radio transmitters (the nuclear spins of the hydrogen nuclei of your water molecules). In an MRI unit, these little radios can be made to broadcast their positions, giving a detailed picture of the inside of your head.

Build coin expressions, then exchange them for variable expressions. Simplify and evaluate expressions until you are ready to test your understanding of equivalent expressions in the game!

The realities of slavery and Reconstruction hit home in poignant oral histories from the Library of Congress. In these activities, students research narratives from the Federal Writers' Project and describe the lives of former African slaves in the U.S. -- both before and after emancipation. From varied stories, students sample the breadth of individual experiences, make generalizations about the effects of slavery and Reconstruction on African Americans, and evaluate primary source documents.

This lesson unit is intended to help teachers assess how well students are able to identify and use geometrical knowledge to solve a problem. In particular, this unit aims to identify and help students who have difficulty in: making a mathematical model of a geometrical situation; drawing diagrams to help with solving a problem; identifying similar triangles and using their properties to solve problems; and tracking and reviewing strategic decisions when problem-solving.

This lesson unit is intended to help teachers assess how well students are able to: solve linear equations in one variable with rational number coefficients; collect like terms; expand expressions using the distributive property; and categorize linear equations in one variable as having one, none, or infinitely many solutions. It also aims to encourage discussion on some common misconceptions about algebra.

This lesson unit is intended to help teachers assess how well students are able to formulate and solve problems using algebra and, in particular, to identify and help students who have the following difficulties: solving a problem using two linear equations with two variables; and interpreting the meaning of algebraic expressions.

This lesson unit is intended to help teachers assess how well students are able to solve quadratics in one variable. In particular, the lesson will help teachers identify and help students who have the following difficulties: making sense of a real life situation and deciding on the math to apply to the problem; solving quadratic equations by taking square roots, completing the square, using the quadratic formula, and factoring; and interpreting results in the context of a real life situation.

This lesson unit is intended to help teachers assess how well students are able to: interpret a situation and represent the variables mathematically; select appropriate mathematical methods to use; explore the effects of systematically varying the constraints; interpret and evaluate the data generated and identify the break-even point, checking it for confirmation; and communicate their reasoning clearly.

Sor Juana Inés de la Cruz, la primer gran poeta de América Latina, es considerada una de la figuras literarias más importantes del continente americano y una de las primeras feministas. En el siglo XVII, defendió su derecho a la educación, proponiendo la mayor participación de las mujeres en la cultura y la pedagogía en una sociedad dominada por los hombres.

Sor Juana Ines de la Cruz, the first great Latin American poet, is still considered one of the most important literary figures of the American Hemisphere, and one of the first feminist writers. In the 1600s, she defended her right to be an intellectual, suggesting that women should be educated and educators and accusing men of being the cause of the very ills they blamed on women.

This lesson unit is intended to help teachers assess how well students are able to: recognize the differences between equations and identities; substitute numbers into algebraic statements in order to test their validity in special cases; resist common errors when manipulating expressions such as 2(x Đ 3) = 2x Đ 3; (x + 3)_ = x_ + 3_; and carry out correct algebraic manipulations. It also aims to encourage discussion on some common misconceptions about algebra.

This simulation lets you see sound waves. Adjust the frequency or volume and you can see and hear how the wave changes. Move the listener around and hear what she hears.

This simulation lets you see sound waves. Adjust the frequency or volume and you can see and hear how the wave changes. Move the listener around and hear what she hears.

In this lesson, students examine the first decade of the AIDS epidemic from a variety of vantage points: from the scientists who worked to discover the cause of the epidemic to the public health officials who developed methods of treatment to the activists who demanded that the nation pay attention. Then, students examine how the LGBTQ+ community responded to the epidemic through music and art by watching clips from CNN Soundtracks and conducting a gallery walk featuring artists whose lives were directly impacted by the AIDS crisis.

In this lesson, students will investigate the work and legacies of Black and Latinx pioneers often ignored in larger discussions about LGBTQ+ history, by collaborating with other students in analyzing primary source documents. Students will also explore the ways city governments and activists are working to combat the erasure of Black and Latinx trans women and the broader whitewashing of the Gay Liberation Movement.

Students will compare Kendrick Lamar's "Alright" with black protest songs of the past in order to identify common themes and ideas tat artists have used to illustrate black experience in the United States.

In this lesson. students will read statements from Black Lives Matter and watch a clip fron CNN's Soundtracks to explore the sifnificance of the movement and the music made in response to the issues they rally behind. Students will also analyze clips from the music videos of artists Kendrick Lamar and Beyonce Knowles-Carter to understand music's relation to the Black Lives Matter movement.

Students will analyze demographic data, and watch footage from CNN's Soundtrakcs series and a congressional hearing after the disaster to better understand the magnitude of Hurricane Katrina, and the way the federal government's response brought to light issues of racial neglect. Students will also invesitgate how Kanye West's comments during a national fundraiser articulated the disappointment and anger many black American's felt following Hurricane Katrina.

Students will examine the lyrics and context surrounding three country songs related to the 9/11 attacks: Alan Jackson's "Where Were You When the World Stopped Turning?" Brooks and Dunn's "Only in America," and Toby Keith's "Courtesy of the Red, White, and Blue." Through the lens of these songs, they consider ways Americans reacted to the tragedy of September 11th, and discuss whether some reactions might be more appropriate than others.

In this lesson, students will consider how Germans resisted what the Berlin Wall symbolized during the Cold War by examining the musical cultures that developed in East and West Germany. To do this, students will watch clips from CNN Soundtracks and analyze primary and secondary historical sources such as newspaper articles, cartoons, interviews, and photographs.