I'm a systems kind of gal and it struck me while reading through the Beare, Caldwell and Millikan (1989)  readings for Uni is that many schools that I have worked in have completely overlooked the importance of evaluation.
The perception is that once a program is delivered, that it is successful by default. The students turned up, the teachers taught, ergo it was successful. The ability to set key criteria and then evaluate them is completely overlooked by management. What if every teacher had to distribute an evaluation sheet at the end of each of their classes? What impact would that make?
At the end of last Semester, I got my Year 7 class to write me a report. Overall I was pleased with their feedback. More chocolate, less brainstorming(or thinking skills) activities. Feedback from the kids ranged from a blank page, and a few scribbled things through to full blown reports explaining my strengths and weaknesses. The kids were surprised when I asked them, but even more surprised when I chatted to them about the areas for improvement the first day back.
How does this relate to TL's? What if a TL could do a quick survey (the technology exists) of a year level after a research project was submitted, but before the marks came back? As Beare, Caldwell and Millikan state "Evaluation is the gathering of information for the purpose of making a judgement". It shouldn't be a discrete activity, or carried out in isolation. They make the statement that every aspect of the organisation should be evaluated at one state. I would propose that an individual classroom teacher should at least to one evaluation each subject cycle, ie. Semester. At the senior levels, evaluation at the end of each outcome or major assessment task would be useful.
I have worked in schools that had an appraisal system in place and the presentation of such evaluations would hold you in good stead with the Principal each year. It would show that you were open to the opportunity of continual improvement.