Create a creature that uses air to create motion with this challenge. Site includes tips, lesson plans, and a place for students to document their design process.

Build a machine that accomplishes a task in an inefficient way with this Rube Goldberg challenge. Find some tips and a place to document your engineering process on this site.

Using common household materials students are challenged to make a flying raptor and control its flight with attached strings. Site includes lesson plans, tips, and a place for students to document their process.

To commemorate the 25th anniversary of the explosion of the Challenger, PBS provides an article that describes the repercussions of the disaster.

Need some challenging problem-solving work for your students in the following areas: Discrete, Geometry, Numbers, and Code Breaking? This is the place for an enormous database of problems aimed at high school age students. They are...

Analyze the rewards and challenges of self-employment.

This resource from Khan Academy provides a study resource about the weaknesses of the Articles of Confederation, Shay's Rebellion, and the needed call for a new Constitution. These questions are intended for students taking high school...

Using cardboard, popsicle sticks, rubber bands, and strings create a pine cone that opens and closes. This site contains lesson plans, tips, and a place for students to document their engineering design process.

Build a zoetrope machine where you can animate a facial expression and the machine plays the animation back with this site. Site contains lesson plans, tips, and a place to document your design process.

This interactive activity, from the Web site developed for the PBS series "Building Big," use your knowledge of bridge design to match the right bridge location in a fictitious city.

A senior high lesson plan on segregation in schools.

Students will build a water drop maze using no-cost materials and see if they can make it to the end without their drop of water falling off or falling in.

A brief survey of the beginning of the Cold War and the challenges that faced the United States in confronting communist totalitarianism.

Choose equivalent forms of radical and exponential expressions. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Find the distance between points, graph points, and interpret data on coordinate planes to solve word problems. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Try some coordinate plane word problems focusing on quadrant 1. Miss the problem, and Kahn offers some tutorials for help.

Round decimals using number lines. Select numbers that round to a given value. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Just like the Montgomery Bus Boycott, the first sit-in at a Woolworth's lunch counter was the beginning of a nonviolent movement to challenge "white only" laws. Read about how the sit-in movement spread across the South. See how...

Support healthy eating by using these resources in the classroom. The Healthy Lunchtime Challenge was a nationwide recipe contest for kids ages 8-12 that promotes cooking and healthy eating. Winners attended a "State Dinner" at the White...

This instructional activity will engage students in discovery learning. Through various tasks, 6th graders will learn the characteristics and challenges in daily family life that may be experienced when living independently....

Learn basic keyboarding with this interactive keyboard. The focus is on identifying letter positions on the keyboard. Responses are checked immediately.

Research and report on two pressing environmental concerns in Africa: the scarcity of clean water and the desertification of farmland. Respond to these issues through activities involving art, drama and journalism.

This is a site that describes African women moving away form the traditional roles in society and shaping the political and social culture in all areas of Africa.

This tutorial makes the memorization of metric prefixes fun. Students can race the clock to see how well they have the prefixes memorized.