A+ 9 Exceptional
A  8 Excellent
A- 7 Great
B+ 6 Highly Satisfactory
B  5 Satisfactory
   4
C  3 Conditional
F  2 Failure
   1
   0
I  X Incomplete

(The 0-9 is used for averages. 
 I made this up, because I could not find anything else.)

The only rules I can find are
 - Grad students need an average of B+ (But it does not say how the average is taken)
 - If they get 3 Cs (in half courses) then they get kicked out.
    Well they only take 5 half course so 3 Cs would be bad.
http://www.yorku.ca/grads/calendar/regs.pdf pg 38.

Alg_Marks(student)
% Assignments:
  loop for every topic:
    i=0, M=0
    loop
      I will give one question.
      You will get a mark m from {0,9}
      Your grade will be  M = max(M,m-2i)
      exit when you like your mark M for this topic.
      ++i
    end loop
    M_{Topic} = M
  endloop
  M_{Assignments} = Avg_{Topic} M_{Topic}

% Talk:
  loop for fellow student s in class
    M_s = student s gives you a grade on your talk.
  end loop
  M_{student,talk} = Avg_s M_s
  M_{prof,talk}    = prof gives you a grade on your talk.
  M_{talk}         = Avg( M_{student,talk},M_{prof,talk} )

% Other:  
  M_{exam}         = translated from % to 0-9
                     (C for undergrads translates to C, fail to fail)
  M_{participation} = my view on how hard you work 0-9
  
  if( M_{exam}=fail ) then return( Fail course ) % Veto

  return(   0.3*M_{Assignments} 
          + 0.3*M_{talk} 
          + 0.3*M_{exam} 
          + 0.1*M_{participation} ) 
end Alg