My book, Tech Units and Stories, contains over 20 units. Each unit has a personal story that shares how the unit evolved. The book accompanies an extensive website that I put together with units that have videos, handouts, resources and ideas. Those who use the book are encouraged to e-mail me if they see a need to change a lesson. Tech books become obsolete within a short time because the technology is constantly changing. Because the units are online and I can make modifications, this book will remain useful over time. As a computer teacher, I am constantly updating lessons to keep up with those transformations. As time permits, those online units will also be modified. You can read "How to use this Book" in order to learn how you can access my online units. These units have evolved since I started teaching computer design in 2003. The website has a New section that grows with online lessons that are engaging and meaningful.