Teaching History to High School Students

I love the idea of teaching history to high schooles, and i'm just wondering, how are the inventions chosen? And i know you mention the goal, one of the goals is to inspire. Is this just more to have contexts and not think that things just grow magically out of thin air? I don't know. It's a really great topic. Let's pick it up again some day. We're trying to pick out the ones that have the biggest impact on creating the modern world; they were the biggest advances. So we try to kind of pick out some of the most important ones. There are so many great and amazing and important inventions. How do you pick out a reasonable