Build a gene network! The lac operon is a set of genes which are responsible for the metabolism of lactose in some bacterial cells. Explore the effects of mutations within the lac operon by adding or removing genes from the DNA.

This lesson unit is intended to help teachers assess how well students are able to identify linear and quadratic relationships in a realistic context: the number of tiles of different types that are needed for a range of square tabletops. In particular, this unit aims to identify and help students who have difficulties with: choosing an appropriate, systematic way to collect and organize data; examining the data and looking for patterns; finding invariance and covariance in the numbers of different types of tile; generalizing using numerical, geometrical or algebraic structure; and describing and explaining findings clearly and effectively.

This lesson unit is intended to help you assess how well students working with square numbers are able to: choose an appropriate, systematic way to collect and organize data, examining the data for patterns; describe and explain findings clearly and effectively; generalize using numerical, geometrical, graphical and/or algebraic structure; and explain why certain results are possible/impossible, moving towards a proof.

Generate electricity with a bar magnet! Discover the physics behind the phenomena by exploring magnets and how you can use them to make a bulb light.

How does a lens form an image? See how light rays are refracted by a lens. Watch how the image changes when you adjust the focal length of the lens, move the object, move the lens, or move the screen.

This lesson unit is intended to help teachers assess how well students are able to use geometric properties to solve problems. In particular, the lesson will help you identify and help students who have the following difficulties: solving problems by determining the lengths of the sides in right triangles; and finding the measurements of shapes by decomposing complex shapes into simpler ones. The lesson unit will also help students to recognize that there may be different approaches to geometrical problems, and to understand the relative strengths and weaknesses of those approaches.

Resource suggestions to explore and consider as a way to support your family learning during school closures.

Resource suggestions to explore and consider as a way to support student learning in grades 3 - 5. 

Explore the world of lines. Investigate the relationships between linear equations, slope, and graphs of lines. Challenge yourself in the line game!

Visualize the gravitational force that two objects exert on each other. Change properties of the objects in order to see how it changes the gravity force.

Visualize the gravitational force that two objects exert on each other. Change properties of the objects in order to see how it changes the gravity force.

Move the sun, earth, moon and space station to see how it affects their gravitational forces and orbital paths. Visualize the sizes and distances between different heavenly bodies, and turn off gravity to see what would happen without it!

Move the sun, earth, moon and space station to see how it affects their gravitational forces and orbital paths. Visualize the sizes and distances between different heavenly bodies, and turn off gravity to see what would happen without it!

Was the Treaty of Versailles, which formally concluded World War I, a legitimate attempt by the victorious powers to prevent further conflict, or did it place an unfair burden on Germany? This lesson helps students respond to the question in an informed manner. Activities involve primary sources, maps, and other supporting documents related to the peace process and its reception by the German public and German politicians.

Release of the film Green Book (2018) inspired renewed interest in the experiences of African Americans when traveling in the United States during the 20th century. This inquiry-based lesson combines individual investigations with whole or small group analysis of primary sources and visual media to investigate the compelling question: How have the intersections of race and place impacted U.S. history and culture?

How do greenhouse gases affect the climate? Explore the atmosphere during the ice age and today. What happens when you add clouds? Change the greenhouse gas concentration and see how the temperature changes. Then compare to the effect of glass panes. Zoom in and see how light interacts with molecules. Do all atmospheric gases contribute to the greenhouse effect?

In this unit, students will trace the development of sectionalism in the United States as it was driven by the growing dependence upon, and defense of, black slavery in the southern states.

In August 1964, a small military engagement off the coast of North Vietnam helped escalate the involvement of the United States in Vietnam; the Vietnam War would become the longest military engagement in American history prior to the Iraq and Afghanistan wars.

This lesson sensitizes students to the similarities and differences between cultures by comparing Shakespearean and Bunraku/Kabuki dramas. The focus of this comparison is the complex nature of revenge explored in The Tragedy of Hamlet, Prince of Denmark and Chushingura, or the Treasury of the Loyal Retainers.