First figure your homework grade.  Your HW percentage is your
total Sapling points divided by 2250 (90% of the total possible
Sapling points of 2500) then multiplied by 100%, with a maximum
of 100%.  As an example, say you have earned 1980.0 Sapling points
for the session.  Your HW percentage would then be:

                      1980.0/2250  = 88.0%

HW is worth 8 points overall, so you would have earned 7.04 HW points
(i.e. 88.0% of 8)


     Now figure your TP grade.  There will be about 50 TP questions
for the session, so a total of about 150 TP points are possible.  However,
we will figure the final TP percentage out of only 135 points (or about
90% of all possible TP points should the number of possible TP points
change).  Once again, you can't get more than 100%.  There ended up
being 57 TP questions for a possible total of 171 TP points, and we
chose to figure the final TP percentage out of 150 points (87.7% of the
possible TP points).  Say you have earned 123 TP points for the session.
Your TP percentage would be

                        123/150 = 82.0%.

TP is worth 5 points overall, so your TP points for the semester are
4.10 (82.0% of 5).

     Now figure your quiz total.  We grade quizzes out of 10 points
and we take your best 15 of 21 quizzes.  Say your best 15 quizzes total 
up to 118 points.  Your quiz average is then 118/15 = 7.87.  Quizzes are 
worth 7 points overall so your quiz points for the session are 5.51 
(78.7% of 7).

 Now figure your test total.  In the summer there are four tests
in 2 parts each, for a total of 8 parts, or "halves".  Multiple Choice
halves are worth 12 points and Lecture Quiz halves are worth 40 points.
You may keep any three MC halves and any three Lecture Quiz halves except
that you must keep at least one part of test 4, which serves the purpose
of an exam.  Your test average is the total of the three MC halves you
keep divided by 36, plus the total of the three LQ halves you keep 
divided by 120, with that sum divided by two.  For example, say these
are your test scores:

           TEST 1      TEST 2      TEST 3      TEST 4
         LQ    MC    LQ    MC    LQ    MC    LQ    MC 
         34     7    23     9    35     9    29     5

With these scores you would want to drop TEST 2 Lecture Quiz and
TEST 4 MULTIPLE CHOICE.  Your test average would be:

 [(34 + 35 + 29)/120 + (8 + 9 + 9)/36]/2 = [(98/120)+(26/36)]/2 = 0.7694 
                                                                or 76.9%

Tests are worth 80 points overall, so your total test points are

                 80 * (0.7694) = 61.56 points

     This makes your overall total 7.04 + 4.10 + 5.51 + 61.56 = 78.2.  
What will be your final letter grade?  That depends on what the final
grade scale is.  I start with no curve.  That is 

                 90 and above           A
                 80-90                  B
                 70-80                  C
                 60-70                  D
                 below 60               E

If the class average is 75 or higher, there is no change.  If the
class average falls below 75, I feel obliged to relax this scale
somewhat.  Look at 

                     summer 2011 web page 
                 or  summer 2010 web page 
                 or  summer 2009 web page 
                 or  summer 2008 web page 
                 or  summer 2007 web page 
                 or  summer 2006 web page 
                 or  summer 2005 web page 
                 or  summer 2004 web page 
                 or  summer 2003 web page 
                 or  summer 2002 web page 

to get an idea for what this year's scale might be.