I start right off on the first day, since I normally have a self-contained ELL class. (middle school - one class period - 50 min.) This year I will be doing consultation, but plan to start off on the first day.
As a language arts department, we give a diagnostic assessment to all students. I use the information gathered from that to start off with, tweaking as needed. I already know my 8th graders, so my focus here is really the new 7th graders or incoming students. Anytime a new student comes in I give a short skills assessment.
I also use the previous year's ACCESS scores and have found a nice tool to share scores/information with the students' teachers. I started using it last year and found it very helpful. Here's the link to where I found it. It was a free download.
http://www.teacherspayteachers.com/P...emplate-236855
I insert each student's name and their overall ACCESS score. Because the can do discriptors are shortened to fit on the form, this year I plan to give a full copy of the discriptors to the teachers so they have a better idea where the students have performed. I also remind teachers that the scores are from January, so we can expect some growth since then.