lesson plans

I am a mainstream teacher in the middle school setting. I
see many ESE students each day.
What is the best way for me to document their
accomodations/modifications in my lesson plans?
Many of the students share the same accomodations
(extended time, shortened assignments etc) I am thining
of creating a spreadsheet that would list the names of the
students down the side and list of accomodations across
teh top. I would then put a mark in the intersecting box
indicating that the specific accomodation was used.
Is this specific enough?
Any suggestions would be greatly appreciated. I see 150
students per day. Out of the 150 aprx 45 have
accomodations or 504 plans.
Thank you