Outstanding Department; please help

I need help. We've got a training day on the 1st day back after half term, and it is going to be brilliant. Instead of a 1 size fits all day in school, it is a cross county federation day, with different schools offering different things. So, there are sessions for NQTs and sessions for less experienced teachers. My ks3 co-ordinators are going to sessions about KS3 across the curriculum and my KS4 co-ordinator is approaching threshold, so going on a session targetting that. I've opted for a day about taking a department from good to outstanding; as a middle leader it sounded like a good idea.

So far so good. Then towards the end of last week I was asked (with 2 other HoDs) to actually run some of the session! That's where I need help. Please give me hints on how to run an outstanding department, or at least how to tell people how to run an outstanding department.

I've got some ideas, naturally. I'm going to use my Monday Morning Maths Memo as a way to share best practice, and as a way to lead a large team. I'll also mention #newleaders(if I can re-find them) and #movemeon, but would like other practical things. Please comment, or Tweet me.

Dodgy Statistics - or am I being oversensitive.

I need a little help. I am a Statistician by nature, so sometimes get a little oversensitive when it comes to analysing stats - I get ... wound up? irritated? ... by dodgy stats.

Here's the latest, and you can tell me if I'm right, or if I need to shut up and get on with it.

Last years Y13 did an exit questionnaire, for ALIS. It asked them all about what teaching styles they experienced in each subject that they studied. For example ...
"Presentation of a topic by the teacher" or.../
" Practical Work (Using apparatus or Making things)."
... and so on. There were 22 catagories.

Students rate each one from 1 to 6, on the follwoing measure..
1 = never or almost never
2 = about once a term
3 = about once a month
4 = about once a fortnight
5 = about twice a week
6 = about once a lesson.

Scores for all students in each subject (sample size = 7 in my case, but that's another gripe) were then averaged (arithmetic mean for fellow stats types), and these published and compared with national figures.

Here's the problem(s).
1. My Preparing Essays scores was 1.29 (1+1/7). This means that one student thought we prepared essays about once a term. I haven't prepared an essay since my PGCE in 1996. This is a lack of awareness by the students that sheds doubt on all responses.

2. If 4 students respond "Never" and 3 respond "once a lesson" then the average is 22/7 = 3.14 which appears to be once a month despite the fact that NOT ONE STUDENT said once a month. Surely the mode (most common) response of "Never" is more appropriate?

Please help me out with this one?!