Google Custom Search - education search engine
Google URL Shortener - create an easier URL to use when sharing your projects
Google Play for Education - push out free books, apps, and videos to students
Google Advanced Search - use filters to find exactly what you need
Google Connected Classrooms - virtual fieldtrips 
Google Earth - does not work with chromebooks, however great for directed classroom activities
Google Lit Trips - downloadable files that mark the journey of characters from famous literature
Google Cultural Institute - exhibits and collections from museums and archives around the world
Tour Builder - mark out a story on a map for others to discover, uses Google Earth
Google Scholar - a search engine from Google that looks for scholarly literature
Google for Education - information about products, training, and resources from Google
Google Trends - search for trends related to topics, key words, people, and more
Google Correlate - find search patterns which correspond with real world trends (query)
Google Ngram Viewer - graph information about topics, words, people between set dates
Google Public Data - search public data
Google Inside Search - search education online, improve your search skills
A Google A Day - practice search skills by playing a game
Google Now - personalized home page from google