I was the last school year to do A levels.. then it changed to GCE's then GCSE's .. I knew something was terribly wrong when one of my apprentices passed his college exams in about 2000 yet didn't know what 3 x 8 was and upon further questioning I found his maths at a very poor standard, the UK's Maths and Sciences competence of school leavers is one of the lowest in the world and this has happened all in the last 25years - they estimate the maths and English competence of a school leaver now is that of a 12yr old 30yrs ago.. we had to learn up to our 15th time table in our heads and we would miss breaks if the teacher caught you out giving a wrong answer.
This is no dig at yourself as its a failure of the education system and progressive goverments dumbing down education to maintain high pass rates- the various cause are for a different thread if your interested but the comparitive stat's between the decades and our bottomed out world position is very good evidence of this.