Professional organizations exist to advance the interests and values of a particular profession. Different professional organizations represent aspects of higher and adult education, such as:
Information from professional organizations would be considered "grey literature."
A helpful tool for searching professional organizations is the Google site search tool. You enter your existing search words and then add "site:" and a domain or URL you want to search. You could then, for example, search the website of a professional organization you think will have reports or news on a topic of interest.