If there are nine people in a room and every person shakes hands exactly once with each of the other people, how many handshakes will there be? How can you prove your answer is correct using a model ...

Companies are placing a greater emphasis on selecting, developing, and promoting employees with advanced problem-solving abilities. Research from the World Economic Forum shows that 5 of the top 10 ...

The designers for Monte Vista Elementary School’s proposed outdoor classroom had some key questions to answer: What materials could they use while staying under the district’s $10,000 budget? How much ...