By the time I learned my times tables at primary (elementary) school in the UK in the mid 70s, decimalisation was well under way. The old money system of 20 12 penny shillings to the pounds had been replaced with a 100p pound. The metric system was on the horizon, but everyday measures were still in yards, feet, inches, ounces and pounds. We were taught times tables up to 12, and I still remember my 11 and 12 times tables. Very handy for thinking in dozens or feet and inches. I guess our 12/24 hour clock system is the last hold out of the dozenal approach. I'd prefer whole hearted decimalisation and reform of the clock system. Or base 16. But not base 12!

No, no, no. There are dozens of reasons why we shouldn't.