FOIA.gov https://www.foia.gov/ is the government’s central website for the Freedom of Information Act (FOIA).
The United States Department of Justice offers the full text of the Freedom of Information Act online https://www.justice.gov/oip/freedom-information-act-5-usc-552, showing all amendments to the statute.
The complete text of FOIA is offered online https://www.law.cornell.edu/uscode/text/5/552 through Cornell Law School’s Legal Information Institute.
foia.wiki https://foia.wiki/wiki/Main_Page is a free and collaborative resource on the United States federal Freedom of Information Act (FOIA).
The American Civil Liberties Union https://www.aclu.org was founded in 1920 “to defend and preserve the individual rights and liberties guaranteed to every person in this country by the Constitution and laws of the United States, and its FOIA request template (?) is available here https://www.aclu.org/legal-document/foia-request-under-freedom-information-act
Litigation Under the Federal Open Government Laws 2010, published by EPIC Publications in Washington, D.C. (2010), offers the most comprehensive discussion of the federal open access laws and I use it regularly.
The National Security Archive https://nsarchive.gwu.edu/nsa/foia/guide.html is a nonprofit that was founded in 1985 by journalists and scholars dedicated to monitoring rising government secrecy.
The National Freedom of Information Act Coalition https://www.nfoic.org is a nonprofit committed to “Protecting Your Right to Open Government.”
The Society of Professional Journalists https://www.spj.org is a nonprofit dedicated to “Improving and protecting journalism since 1909,” and they offer a step-by-step guide especially for students https://www.spj.org/foi-guide-students.asp
The Reporters Committee for Freedom of the Press https://www.rcfp.org/ provides pro bono legal representation and other legal resources to protect First Amendment freedoms and the rights of journalists.
Wikipedia Article on Freedom of Information Act: https://en.wikipedia.org/wiki/Freedom_of_Information_Act_(United_States)