I'm a huge fan and user of Google's many tools and resources for educators. I recently found another great site that helps teachers learn about these tools and how to use them in the classroom.
Integrating Google Tools 4 Teachers has tips, resources, and ideas for using Google tools such as Docs, Presentations, Sites, Maps and more in the classroom, including a section on using Google tools to help with STEM education. It even has a list of pro's and con's for Google Apps for Education and regular Google tools. The site is run by Colette Cassinelli, a Google Certified Teacher.
This is a great site to find out more about Google Tools and how to use them in your classroom.