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Th 4/1/04
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HW due: Spend
another 35 minutes (minimum) on §10.6 #2, 6, 9, 11. These will probably be
collected.
Reminder: You may work with
friends on HW assignments, but outright copying is an honor code offense and
will be treated as such. Also, your time log is a statement of honor and
cannot be falsified.
Schedule for today (trial run of the
“Conor Concept”): Brian, both Michaels, Cameron, Trevor, Josh, Mitch,
Zack, Jonathan, and Jack should arrive before 10:45 so that we can begin at
10:45 sharp. Everyone else should arrive in time for a switchover at 11:10
sharp. Note: There will be no
bathroom breaks or interruptions permitted during the shortened class. We
will see how well this works and decide next week whether to continue the
experiment.
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F 4/2/04
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No class today (Form VI
retreat). Juniors have a day of rest. If you desire extra help, please make
an appointment with me so that I will be sure to be on campus during the time
you wish.
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M
4/5/04
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Since the “Conor Concept” seemed
to work fairly well on Thursday, we will try it again through Wednesday of
this week. Brian, both Michaels, Cameron, Trevor, Josh, Mitch, Zack,
Jonathan, and Jack should arrive before 10:45, and everyone else should
arrive in time for a switchover at 11:10 sharp.
HW due: Read §11-3; write §11-2 #1, 4, 8. Since #1 and #4 are reviews of
previous material (and should be solvable in about 3 minutes each), I expect
to see evidence of significant, solid work on #8, not merely a diagram and a
question mark.
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T
4/6/04
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“CC schedule” HW due: Read §11-6; write §11-3 #1b, 3, 12. Again, since #1
and #3 are relatively straightforward, I expect to see good evidence of work
on #12, not merely a diagram and a question mark.
Note: I had originally assigned #1a,
but upon reflection we have to delete this problem because it is not solvable
with the techniques available to us. Mea culpa! (However, a very interesting
and educational problem is to explain exactly why #1a is not solvable using the method of disks or washers.)
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W
4/7/04
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“CC schedule” HW due: Write §11-2 #5, 7; §11-6 #3, 8, 13.
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Th
4/8/04
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No class today (Form VI
Career Day).
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F
4/9/04
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Normal Friday start time (11:15) for everyone.
HW due: p. 592 #R1, R2. With any remaining
time that you have, rework any of
the problems from Chapter 11 that you had trouble with on the first pass.
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M
4/12/04
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CFU (by your vote) on Chapter 11. Everyone should come at 10:45 sharp so that we can
take the CFU and go over the answers during the 50-minute period.
HW due: Complete all “loose ends”
from Chapter 11, including R1 and R2 on p. 592. A random subset of these
problems will be scanned or collected. By now they should all be complete
and, if not correct, at least set up with an integral that is defensible. You
are welcome to compare answers with classmates, though of course you may not
directly copy anyone’s solution.
Reminder: As we discussed earlier
this week, time logs will not be accepted. You are responsible for actually completing
all of the assigned problems from Chapter 11. Remember that for full credit,
HW must be organized in such a way that you can pull out selected sheets on
command.
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T
4/13/04
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Test on Chapter 11;
10:45 start time for everyone. This
was originally scheduled for yesterday but was moved by a majority vote of
the class.
Answer key: DBBAD DCCAC.
Statistics: The adjusted test mean
was 70.1, and the median was 72. Scores ranged from a low of 42 (negative raw
score) to a high of 98. The standard deviation was 16, which is high (10 is
typical).
Scoring adjustments: Although
question #5 could be solved as originally posed, it was tricky. From the
analysis of scores it was obvious that most students assumed that the function
d(r) was treating r to be
in meters, even though by checking d(8)
and d(800) one can quickly deduce
that r is supposed to be in cm. To
account for this confusion, I simply added 5 raw points to everyone’s initial
raw score. For example, if your raw score was 20/40 (C), your adjusted raw
score became 25/40 (B).
The reason I did not make a similar adjustment for question #6 is that if one
were to continue with the erroneous assumption described above for #5, one
would have a density everywhere throughout the region of more than 0.049 g/cm2.
Since the area of the region is easily found to be more than 2 million cm2,
the mass of paper must be about 100 kg. Here are the computations:
0.049(pR2) =
0.049p(8002) » 98,520 g » 100 kg
This would force a choice of (E) if one were to follow the printed
directions. However, nobody chose (E), which means that none of the people
who made the common error in #5 felt confident enough about the accuracy of
their answer to pursue it to its logical conclusion. Since everyone was
already fully compensated for #5, there is no need for a further adjustment
in #6.
Finally, everyone earned 4 percentage points (not raw points) for perfect
attendance by the class.
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W
4/14/04
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Today’s class is an AP
review session. Come for the first half, the second half, or both if you
wish. The door will be unlocked only at 11:10, and you won’t be able to drift
in and out.
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Th
4/15/04
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HW due:
Correct Tuesday’s test to 100% accuracy,
showing work.
Schedule for today: AP review, continued. Come for the first half, the second
half, or both if you wish. The door will be unlocked only at 11:10, and you
won’t be able to drift in and out.
There will be a homework spot check today, and the spot check may include any
recent assignments as well as your Chapter 11 test corrections.
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F
4/16/04
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No class (Diversity Day).
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M
4/19/04
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CFU AP, Part IA. (Multiple choice, no calculator, 10 points.) Everyone must take
this. However, the score will be based on whether you spent 30 minutes
working, not on how well you answered the questions.
People who were absent today should avoid peeking at the answer key below.
See your mailbox for a copy of the test, and submit your answers and scratch
work for 10 points of credit.
Statistics: mean 74, median 74,
standard deviation 11. These were disappointing, considering that you had
seen several of the questions on previous tests.
Answer key: CADCE BCCBA CDEAB.
Advertisement: A not-so-wise
student will coast through the next two weeks without doing much homework and
will probably not do very well on the AP exam. A much wiser student will
spend time each night learning from his mistakes and reviewing the relevant
sections in the textbook or Barron’s book, and he will do better and better
each day.
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T
4/20/04
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Practice AP, Part IA. (Multiple choice, no calculator, 50 points.)
Everyone must take this. If you are absent, yesterday’s CFU grade will be
counted instead. Attendance is optional. If you are happy with your score
from yesterday, you need not come to class. However, in that case, you should
still submit your answers and scratch work for the real test for 10 points of
required credit.
Statistics: mean 74, median 74,
standard deviation 9. The statistics for the maximum of yesterday and today
are more typical: mean 78, median 78, standard deviation 9. In my 6 years at
STA, I have usually seen a mean of 77-80 and standard deviation of 10, which
means that these scores are ever so slightly on the low side. If you keep
studying each night, I am sure that there will be steady improvement in the
days ahead.
Answer key: CABDC BAADE DE.
Questions 13-15 were free. Congratulations to the students who earned 1 bonus
point each by noticing that the previously posted answers to #6 and #10 were
incorrect. Also note that for question 10 as originally written on the board,
choice D with 2x in the denominator
would also be correct. However, for the printed version posted on the Web,
choice E is the only correct answer.
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W
4/21/04
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CFU AP, Part IB. (Multiple choice, calculator required, 10 points.) Same rules as on
M 4/19.
Statistics: mean 71, median 76,
standard deviation 20.
Answer key: EDB CEB CBDD. Because
question 1 could not be solved with washers, I scored it as a free question
(+5) for everyone. However, only C and E are reasonable guesses, because you
can easily check with your calculator that choices A, B, and D produce
negative answers.
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Th
4/22/04
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Practice AP, Part IB. (Multiple choice, calculator required, 50 points.)
Same rules as on T 4/20.
Statistics: mean 82, median 81,
standard deviation 15.
Answer key: EAE EDCA CAB.
Advertisement: A not-so-wise
student will coast through the next two weeks without doing much homework and
will probably not do very well on the AP exam. A much wiser student will
spend time each night learning from his mistakes and reviewing the relevant
sections in the textbook or Barron’s book, and he will do better and better
each day.
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F
4/23/04
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CFU AP, Part IIA. (Free response, calculator required, 10 points.) Same rules as on M
4/19.
I have finished revising the AB Calculus Cram
Sheet and have added it to the “Links for AP Preparation” as well.
Perhaps you will find it helpful.
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M
4/26/04
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No school (FBK Day).
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T
4/27/04
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Practice AP, Part IIA. (Free response, calculator required, 50 points.)
Same rules as on T 4/20.
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W
4/28/04
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CFU AP, Part IIB. (Free response, no calculator, 10 points.) Same rules as on M 4/19.
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Th
4/29/04
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Practice AP, Part IIB. (Free response, no calculator, 50 points.) Same rules
as on T 4/20.
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F
4/30/04
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Day of rest for most of the
class. Others should meet me in my office at the designated appointment time.
If you have not already done so, please read the AB Calculus Cram Sheet over the weekend as
you prepare for your AP exams.
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