Master Class Schedule -- Possible?

[three_sickles_short <three_sickles_short@hotmail.com>]

No: HPFGUIDX 51504

Hi, everyone.  I'm Three Sickles Short--TSS for, erm, short ;-)--and 
I'm new here.  This has probably come up before, but I can't find a 
direct answer in the FAQs, so here goes:  I'm trying to come up with 
a master class schedule for the fifth-year fic that I'm writing, and 
it's giving me fits.  According to the rendering of Harry's Book 4 
schedule at the HP Lexicon (check it out at 
http://www.i2k.com/~svderark/lexicon/calendar_gf.html), we have 4 
class periods per day (2 before lunch and 2 after) 5 days per week.  
This works fine so long as you're only trying to worry about Harry's 
schedule, but gets troublesome when you try to work in all 7 years. 

Take, for instance, Potions.  If Double Potions meets for 2 periods 
per day twice a week, you need 28 periods to get all the classes 
accommodated (7 separate classes meeting four periods per week), and 
the Lexicon schedule only gives us 20 periods.  Even if the classes 
are only double classes once a week, you'd still need 21 periods (7 
classes times 3 periods per week).  There just isn't room for all the 
classes in a 20-period week.  However, the Lexicon is right that the 
books' evidence seems to indicate a 20-period week.  What to do?  I'd 
appreciate any help at untangling the schedule.

Thanks!

TSS