I'm still in education, doing my A levels - and I experience questions of a fixed form all the time.<p>Now this seems quite good in principle. In lessons you learn about the same ladder against the same wall or whatever, with very slightly changed values each time. Then you do the past papers - and it has the same problems - so you end up with a nice qualification at the end.<p>The problem with this is what I experienced today. The examiners changed the exam - not massively - just enough so that the standard solutions people had learned became worthless.