Another good parent resource is this practical idea of doing language and articulation in the car. These are some quick and easy things that any parent could do with their child to work on their language and/or articulation. The school-based SLP could have this for the parent that is looking to work on language outside of school.
10 Wordless Videos that Teach Problem Solving -- Speech paths are seemingly always on the hunt for materials to address problem solving - did you ever consider videos? I found 10 wordless videos that are fun and make kids think about how to fix the main characters' problems!