Challenges in Writing Correctly for Mass Media

I was on my high school's TV station for three years. During that time I learned how to write broadcast scripts and news stories. Now that I'm in college and enrolled in Writing for Mass Media; I struggle to learn different writing styles for other kinds of media. There are more restrictions, and I have to pay attention to grammar and punctuation. When I write for the camera it has to be clear and concise for a listener to understand. When I write for this class it has to be brief and grammatically correct for a reader to understand.