You can check your grades anytime via PowerSchool online (click on link in "My Bookmarks" box).  Below are listed some of the codes I use so you can decipher what your grade really is:

• M = Missing (you haven't turned it in)
• R = Assignment needs re-done before it can be graded
  
• A = You were absent when assignment was collected/reported and need to make it up
• (  ) = Assignment is turned in, but hasn't been recorded in the computer yet
• X = Assignment has expired (cannot be turned in anymore) and has received no credit
• * = On Extra Credit assignments only; means that you did not earn any Extra Credit points
• EX = Excused (the assignment doesn't count for you or against you)