• Take an Interactive tour  - For first time users, this tour will explain basic navigation tools. 
• Sending, Replying, and other Gmail Basics - covers basics such as printing emails, conversation view, and adding attachments. 
• Create your Signature, Labels and Filters - Labels are similar to folders,  Filters will sort your mail as it comes into your inbox. 
• Groups and Mailing lists - create your own email groups to use with students or colleagues. 
• Sort Messages using Keywords -  How to search you mail. 
• Working in Conversation View, Part 1 -  working with an entire conversation or with one reply within the conversation. 
• Working in Conversation View, Part 2 -  how to mute a conversation
• Unthreaded Gmail -  How to turn conversation view off. 
• Responding to or composing new mail in a New Browser Window. 
• Be More Productive with Priority Inbox
• Clean out your Inbox by Archiving Old Mail. 
• Sort Messages using Keyword search
  • advanced search terms
• Gmail's New Compose and Reply Experience

Training Videos From Google 

• Gmail Overview
• Chat in Gmail
• Create and Send messages in Gmail. 
• Drag and Drob Labels
• What is a Draft message?