I don't have the quotes, but three things that I was taught in school as absolute certainty were:

- There wasn't enough oil and we would be completely out by the mid 1970's. (technology and new reserves proved that false)

- The US would be on the metric system and so we had to all learn it and did NOT learn the current system. (I still struggle with how many cups in a quart and that type of thing - we just never were taught it)

- There would never be a computer smaller than a room...so it was absurd that anyone would ever have personal computers. (I just counted - our family of 3 has 7 personal computers)