TED is chock full of amazing content from the world of thinking, making, creating, innovating, etc.
Most folks know about it by now, so why include it? TED-Ed for one, but for two, it is transformative for enabling customized delivery of the content with piles of UDL features. It's just awesome.
Curate "magazines" full of content from across the web. Create your own from others' content as well as your own. Built for mobile. Visit http://editor.flipboard.com to access the laptop-friendly editing features.
Curate content, creating "magazines" from sources across the web and your own content. Visit http://editor.flipboard.com to go to the laptop friendly section.
Excellent mechanics, grammar, usage, spelling (MUGS) site that allows you to work at your own pace and customize some of the content of the examples with sports, celebrities, music, etc.
Great place to work at your own PACE!