Growing up in Nigeria, before moving to the UK, It was a taboo to forget that pi is 22/7. I am year 9 student. The fact that I have just found out that is so wrong and very much less precise has left really wandering what else I've really LEARNT wrong. The accuracy needed for pi in things like GPS and mobile phones which is a part of most people life, lays emphasis on its importance and should really be kept accurate and precise.