To add a mobi file to your Kindle for PC software to read the chapters on your computer, see instructions at http://tinyurl.com/y8gsazq.
To add a mobi file to your Kindle ereader or tablet, see instructions at http://tinyurl.com/c4xduhn.
The Kindle Personal Document Service allows teachers, or librarians to send a mobi file to up to 15 student Kindle email addresses at a time.
With the Whispercast Service from Amazon, you can provide copies to as many students as you want instantly. And this service is not limited to books purchased on Amazon. You can share documents such as ebooks which you have purchased from other vendors such as Ebooks for Students using Whispercast.