The Center for Media Justice is a dynamic communications strategy and media policy tank for grassroots organizations serving communities of color and America’s poor. http://centerformediajustice.org/
Check out their toolbox: http://centerformediajustice.org/toolbox/media-how-tos/
The Spin Project strengthens nonprofit social justice organizations, small and large, to communicate effectively for themselves. Read more about Spin Project here.
Contact them to get a copy of their manuals https://spinacademy.org/contact-us/