Symbaloo is a free, easy-to-use tool that allows users to organize and categorize web links in the form of buttons. You can create a symbaloo with all the sites you use with your students, and then put it on your teacher home page. It can be edited and changed as the need arises.
You can learn to use Symbaloo and begin to create your own in a short time. YouTube has many videos which can assist you with Symbaloo. You can check out some that will help you get started here: