This is a very interesting article that promotes literacy in social studies while looking at some of the inherent issues. Although based on California's struggles with adopting Common Core, it is relevant to all high school teachers.
Here you will find many mini units on social studies topics that incorporate the literacy standards. I am certain you will find one to use in your classes or that you can adapt to meet your curricular needs.
Scroll through the categories listed on the right of the page, and you should find something that connects with your current classes. These quick videos/readings can be used in so many ways to enrich your curriculum and help you encourage literacy in social studies.
There are quite a few sample plans to choose from on this site. Many of them are high school appropriate. Most of them are not subject specific, so you can use the information and contents to teach any of your current topics.