Google has an excellent selection of free courses and training materials for Google Apps and more. (see a bunch here).
They have just announced 5 new online courses for teachers and administrators on Google for Education that were designed by educators.
New Courses include: Internet 101, Apps for Education, Gmail, Drive, Chrome and Chromebooks. They are self paced and well designed.
You can find the new courses here: https://educourses.withgoogle.com/course
This is a great resource for all educators.
Google for Education Resources: