I'm a huge Android user. I have my HTC One Smartphone and my own Nexus 7 tablet. In addition, my department uses Nexus 7 tablets for mobile access and some of our schools have Nexus 7 and Nexus 10 tablets.
I have a bunch of apps that I use on a regular basis, both when I was a teachers, as well as now as a CIO. This is my list of top apps for educators:
Gmail - email is the main way I communicate with my staff, vendors, and school admin and teachers. It is indispensable for me. I can easily check all of my email accounts (4).
Calendar - my calendar is so busy that I would be lost without this. What's nice is that my personal and work calendars are overlaid for easy viewing.
Drive - access and create/edit/share documents anywhere. You can even view and edit none Google Docs files using QuickOffice (see below) that Google bought and integrated into Drive.
Evernote -is my favorite, and most used resource. I had all of my lesson plans, resources, web clippings, lesson schedule, meeting notes, misc. notes, task lists, reference materials and much more on here as a teacher and I now use it for all of my notes, meeting notes, references, project planning and more . I can access my notes anywhere and can even share notes with others.
Google+ - this is how I connect with other educational, technology, and edtech professionals. Easy to use, great for conversations and tons of great people and communities on here.
Edmodo - this is a major component in our school district and used widely by teachers and staff. It provides some great features and resources and is free.
Student SIS System - access student information anytime. Teachers can also use it to take attendance and as a roll book during a fire drill.
Splashtop - I use this to access my desktop and/or laptop at any time from anywhere. It allows me to do anything on my Android device, including running Windows apps and accessing all of my files.
QuickOffice - access, view, and edit Word, PowerPoint and Excel files.Free version comes with phone and can view documents. Pro version adds editing for a fee.
Another feature of Android I love is the sharing. I can share from app to app with one click. Great for sharing resources with others.
Android for Education Resources
My Favorite Resources for Teachers and Students
Google for Education Resources
Essential Apps and Installs for Windows, Chrome, Android
Why I use Google's Products as an Educator