I get quite a few contact requests asking about APP. Whilst I have used APP and indeed still do, it is only one one of the assessment tools I use, since I am required to report back internally using NC levels.
I found this site whilst searching the Internet, from a Science teacher called Stewart Feather in Birmingham. He has developed a whole approach to APP including a recording system that minimises the time demands on the teacher.
I would recommend that science teachers who use APP on a regular basis check out Stewart’s site – it is well worth a look.