After Amy sneezed all over the tuna salad. So what happened? That is the question readers ask when faced with a subordinate clause unattached to a main clause. And this information sheet shows writers how to combine subordinate clauses...

This trigonometry textbook takes the learner from a basic understanding of angles and triangles through the use of polar coordinates on the complex plane. Written by a mathematician-engineer, examples and problems here are used to...

Study concave and convex mirrors with an in-depth slideshow presentation. Slides contain term definitions as well as labeled diagrams.

Build and design to rock and roll. Pairs research building design in earthquake areas and use computer simulations to see the effects of earthquakes on buildings,. They then sketch and explain a building design that would withstand...

If only there was a reference that listed all the formulas covered in calculus. Luckily, there is. This comprehensive 197-page handbook provides formulas and explanations for all topics in AP Calculus or in a standard college calculus...

The tension of the 236 strings in a grand piano exert a combined force of 20 tons on the cast iron frame. The presentation includes topics such as work, forms of energy, conservation of energy, gravitational and elastic potential energy,...

Building an accelerometer app for your Android device. Groups develop an app that uses the accelerometer on an Android device. The purpose of the activity is to reinforce the programming design. The post activity assessment challenges...

What makes a watershed? What are the natural and human features of a watershed? How do human features affect watersheds? Where can I find my local watershed? These questions are thoroughly explained in an informative watershed interactive.

Class members have an opportunity to consider issues faced by refugees and Internally Displaced Persons (IDPs) by participating in a series of activities that illustrate some of the challenges refugees experience. 

Going once, going twice, sold! An auction provides class members with an opportunity to examine their attitudes toward money. After bidding on and purchasing items, individuals complete an attitude survey and then identify a...

Learners review how to use the completing-the-square method to identify maximum and minimum values of a quadratic function by watching a video. They see how the vertex form relates to the extreme values of a quadratic function, and use...

First create a starting line and ending line in the gym. After divvying up the class into equal teams, each team lines up in a straight row behind the starting point. Each player is lined up behind the other on their team. When...

Barrio de Paz is the story of Nelsa Libertad Curbelo, a nun, who works with the gang youth of Guayaquil, Ecuador. The 17-minute documentary focuses on her explanations for the rise of gangs and for how gang culture reflects...

How do different communities celebrate special occasions? After researching celebrations in their countries, class members investigate other festivals like those associated with Ramadan, Diwali, Chinese New Year, Halloween, Easter,...

Discover the procedure to add and subtract matrices. Pupils use the interactive and discover the pattern in adding and subtracting matrices. Scholars adjust the entries in the addends and see the resulting changes in the sum. They also...

How can you draw a number? A set of questions takes learners through the reasoning for why a geometric construction can be drawn to represent the square root of a number. An interactive helps visualize the construction.