We all know how literal computers are. Things have to be exactly right, so
following instructions correctly can be crucial. The following instructions
were given to an operating systems class on a Tuesday:

"I have 2 email addresses. One is my personal email address in case a 
student needs to contact me during the day because a quick response is 
needed. The other is my University email address for more routine matters."

"By Thursday each student should do 4 things. One is to send me an email so
I can put them on a mailing list for the class. The email should include
the string "CSE3320" in the subject line so my filters can put the email in
the right place so it won't get lost."

The score late Thursday evening with 48 students registered:

10  have not responded at all.
 2  have sent the email to both my email addresses.
 2  have sent email only to my personal email address.
 8  have included the string "cse3320" in the subject. (not too bad - the
            filter doesn't happen to be case sensitive, but ...)
 4  have included the string "CSE 3320" in the subject.
 1  has included the string "CSE-3320" in the subject.
 1  has included the string "csee3320" in the subject.

28 of 48 got it wrong, only 20 got it right.

I guess that's one reason why there are bell shaped distributions on grades.

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Update as of the following Tuesday:

 1 more sent email to both places
 1 included the string "CSE3322" in the subject
 1 had the subject as "getting on e-mail list"
 1 more was correct