The new 6th edition of Applied Combinatorics builds on the previous editions with more in depth analysis of computer systems in order to help develop proficiency in basic discrete math problem solving.

As one of the most widely used book in combinatorial problems, this edition explains how to reason and model combinatorically while stressing the systematic analysis of different possibilities, exploration of the logical structure of a problem, and ingenuity. Although important uses of combinatorics in computer science, operations research, and finite probability are mentioned, these applications are often used solely for motivation. Numerical examples involving the same concepts use more interesting settings such as poker probabilities or logical games.

This book is designed for use by students with a wide range of ability and maturity (sophomores through beginning graduate students). The stronger the students, the harder the exercises that can be assigned. The book can be used for one-quarter, two-quarter, or one-semester course depending on how much material is used.

Fast-paced action movie starring Jeffrey Dean Morgan and Mickey Rourke. The Courier (Morgan) has earned his nickname through a remarkable ability to track down individuals and deliver messages and packages. The Courier is particularly prized, in certain circles, for his refusal to ask questions or query the legality of the material he carries. However, when he is handed a package by a branch of the Russian mafia and asked to deliver it to an especially notorious underworld figure, The Courier's skills will be tested to the limit. He believes he has made a breakthrough when he gets in contact with Maxwell (Mickey Rourke), a former associate of the elusive figure he is seeking, but how far can Maxwell be trusted?

In the spirit of the author's massively popular Twitter thread, Tucker Shaw's When You Call My Name is a heartrending novel about two gay teens coming of age in New York City in 1990 at the height of the HIV/AIDS epidemic, perfect for fans of Adam Silvera and Mary H. K. Choi. Film fanatic Adam is seventeen and being asked out on his first date--and the guy is cute. Heart racing, Adam accepts, quickly falling in love with Callum like the movies always promised. Fashion-obsessed Ben is eighteen and has just left his home upstate after his mother discovers his hidden stash of gay magazines. When he comes to New York City, Ben's sexuality begins to feel less like a secret and more like a badge of honor. Then Callum disappears, leaving Adam heartbroken, and Ben finds out his new world is more closed-minded than he thought. When Adam finally tracks Callum down, he learns the guy he loves is very ill. And in a chance meeting near the hospital where Callum is being treated, Ben and Adam meet, forever changing each other's lives. As both begin to open their eyes to the possibilities of queer love and life, they realize sometimes the only people who can help you are the people who can really see you--in all your messy glory. A love letter to New York and the liberating power of queer friendship, When You Call My Name is a hopeful novel about the pivotal moments of our youth that break our hearts and the people who help us put them back together.

Did you know that close to half of today's jobs in the U.S. could be done by robots and that proportion is rapidly increasing? It is quite possible that about half of today's high school graduates will not have the knowledge or skills needed to get a decent job when they graduate. Tomorrow's high school graduates will be able to thrive in this environment, but only if school superintendents, central office executives, and principals use the strategies employed by the world's top-performing education systems to build the high-performance education systems today's students will need to succeed tomorrow. In Leading High-Performance School Systems: Lessons from the World's Best, Marc Tucker, a leading expert on top-performing school systems with more than 30 years of experience studying the global economy and education systems worldwide, details how top-performing school systems have met head-on the challenges facing school leaders today. You'll learn why our current system is obsolete, explore the knowledge and skills needed to design and build first-rate education systems, and gain a solid understanding of the key elements of high-performance school systems, including the following: A powerful, coherent instructional system with school-leaving certifications that mean much more than today's high school diploma. Partnerships with first-rate universities to ensure a steady supply of highly capable, well-educated, and well-trained teachers. Schools reorganized around highly qualified professional teachers with a career ladder they can climb. High expectations and personalized support to ensure that children arrive at each grade level ready to learn. An equitable system that closes the gaps in student performance. Vocational education for talented youth seeking an applied, academically rigorous education. Leading High-Performance School Systems is an invaluable resource for school leaders preparing today's students for tomorrow's world. This book is a copublication of ASCD and NCEE.