I need Bs

I currently have a C in journalism..and have had one for the whole quarter. I don't really understand why it hasn't gone up at all. I have gotten literally 7 As in a row and it is still a 75 percent. I don't think my teachers understand how much I really need a B. and I hate how there is nothing I can do to bring it up. I thought I was doing fine but guess not. Hopefully there is something to do...