19Pencils is a free site that lets you discover and share educational websites, quizzes and other resources, as well as put all of that content on a website that students can access.
It is extremely easy to use, has some great features, and is free. You can also search the site to find content that is already there from other teachers.
There is a nice dashboard page that has all of your menu options available. You can add content, set up class sites, add assignments for students, and much more. As you search for content already on the site, you can add it to your content to make it easier to find later.
This is a really nice site for teachers to use. Check it out.
