"Public Agenda is a nonprofit, nonpartisan organization that helps diverse leaders and citizens navigate divisive, complex issues and work together to find solutions."
See their freely available online Reports or the list of Discussion Starters for good topic ideas.

"The world's independent source of breaking research news for the media." Note the assortment of topic area links: Sciences, Health, Art, Humanities, Society, Business, Applied Sciences (as well as the geographical links)

"Reports on pros and cons, background and verbatim arguments of legislation before Congress, each issue dealing with one law under consideration."Available since 1921.
Use these indexes to find topics, then look them up by title in Congressional Digest.
Index of Recent Topics
Chronological Index
Note: check access from home to fulltext from index links!

"Our mission: Promoting critical thinking, education, and informed citizenship by presenting controversial issues in a straightforward, nonpartisan, primarily pro-con format."

""Through IssueLab, the Foundation Center is working to more effectively gather, index, and share the collective intelligence of the social sector. We provide free access to thousands of case studies, evaluations, white papers, and issue briefs addressing some of the world's most pressing social problems.""

Good for exploring topics related to issues and themes present in the U.S. Constitution.

Look at the Browse topics or the Hot Topics listings for topic ideas...

"Undark is a non-profit, editorially independent digital magazine exploring the intersection of science and society. It is published with generous funding from the John S. and James L. Knight Foundation, through its Knight Science Journalism Fellowship Program in Cambridge, Massachusetts."

"Launched in April 2015, Hakai Magazine explores science, society, and the environment in compelling narratives that highlight coastal life around the world.

Our mandate is to foster a global conversation about coastlines, the places where much of the world’s population lives. These environments filter toxins, buffer erosion, and support vibrant communities of people, plants, and animals. To understand this land- and seascape, people need access to accurate, unbiased, and engaging information."

"... a science webzine for people all over the world. Its main mission is making active interaction between general public and researchers. People can reach cutting-edge studies in all scientific fields on this webzine. Researchers can post pieces about their academic research in an understandable way in order to make a public appeal of their research activities."

"Undark is a non-profit, editorially independent digital magazine exploring the intersection of science and society. It is published with generous funding from the John S. and James L. Knight Foundation, through its Knight Science Journalism Fellowship Program in Cambridge, Massachusetts."

"Society for Science & the Public (SSP) is a nonprofit 501(c) (3) membership organization dedicated to public engagement in scientific research and education. Our vision is to promote the understanding and appreciation of science and the vital role it plays in human advancement: to inform, educate, and inspire."

"Scitable is a free science library and personal learning tool brought to you by Nature Publishing Group, the world's leading publisher of science.Scitable currently concentrates on genetics and cell biology, which include the topics of evolution, gene expression, and the rich complexity of cellular processes shared by living organisms. Scitable also offers resources for the budding scientist, with advice about effective science communication and career paths. "

Physics, Mathematics, Biology, Computer Science
"... is an editorially independent online publication launched by the Simons Foundation to enhance public understanding of science."

"Coffee Break is a resource at NCBI that combines reports on recent biomedical discoveries with use of NCBI tools. The result is an interactive tutorial that tells a biological story. "

Not just for physics! A great resource for science topics.

Arranged chronologically. Includes special reports on multiple scientific topics; also includes Community & Society (see drop-down menu).

"Spotlight on health and medical news"

"Launched in April 2015, Hakai Magazine explores science, society, and the environment in compelling narratives that highlight coastal life around the world.

Our mandate is to foster a global conversation about coastlines, the places where much of the world’s population lives. These environments filter toxins, buffer erosion, and support vibrant communities of people, plants, and animals. To understand this land- and seascape, people need access to accurate, unbiased, and engaging information."

"Explore the humanities online with this collection of websites, apps, and digital projects supported by NEH grants."

Topical collections showcase primary sources that can be used to generate ideas for research paper projects.

"Demos is Britain’s leading cross-party think-tank.
We produce original research, publish innovative thinkers and host thought-provoking events. We have spent 20 years at the centre of the policy debate, with an overarching mission to bring politics closer to people."