I'm going to be teaching mostly sixth grade, but have one period of 7th grade science. Unfortunately, unlike with sixth grade, there is no official seventh grade science curriculum adopted yet, and I guess the district is working on developing a new one aligned with NGSS. I don't even have the old curriculum though. All I have are a few old student textbooks and no teacher's edition or anything. Science was not my major in college, and unlike everyone else who teaches science in my school, I have my multiple subject credential rather than my single subject science credential, so I feel like I'll have to learn a lot of material to be able to teach it. It's also my first year teaching and school starts on Monday and I just feel so stressed and unprepared, especially for this particular class. Does anyone have any tips? General advice for teaching content you don't know well? Coming up with lessons with no set curriculum??