Smore is a great tool I let my students use to create flyers and posters. The free web based application allows students to easily make flyers and incorporate web content, while sharing it through social media.
I collaborated with the ELA teachers in the 8th grade to make up something about propaganda - check out what the kids made.
Jason's Damon's Ciarra's
Don't forget some other projects that I have done with Propaganda - such as Photostory