How is my grade calculated?  How much are quizzes/tests, etc. worth?

Check the course outline, given to you on the first day of classes!

  Can I drop my lowest <blank> instead? Can I drop a test grade? Do you curve?  What can I do? My grades are so low!

No deals... period.   What you have in the course outline is it.  What can you do?  Study, put in effort.  Nobody said it was gonna be a breeze.  I expect you to work a little, it's not gonna come to everyone right away.  

Oops! I accidentally submitted when I didn't want to!  I changed the right answer by accident!  I clicked the wrong thing in Webassign!  Can I have an extra submission?

No.

Are we doing a lab today?  When is the next test?  We have a quiz today?!

See the current unit plan for your particular class.