Install a script in Google Docs. Create a quiz and take the quiz yourself with all the correct answers. Then after giving a quiz, make a few clicks and your quiz will be graded. Options to look at graphed results and send an email to students sharing their results. Great stuff for even the less tech savvy teacher!
App Inventor is a great tool to teach programming to high school students. Google Intern, Michelle Hutton, created the following 6 week curriculum. This curriculum is a project based curriculum that allows students to explore the world of computer science through the creation of smartphone apps.