I’m an educator (US) who has maintained for nearly three decades that the teaching of times tables past the 10s is complete waste of time. The arguments advanced in this column for the usefulness of learning 12s could as well be advanced for learning one’s 24s table or even more so, ones 60s table.
But the fact is, we started the 12s tables in a time when imperial units seemed to lend some (limited, IMO) utility to the practice. But I need my students to be able to perform their times tables so that they can handle the algorithms of multiplication and fractions. I will even go so far as to say that I believe teaching to the 12s has a retarding effect on many students’ understanding of higher multiplication.
I'm an educator (US) who has maintained for nearly three decades that the teaching of times tables past the 10s is complete waste of time. The arguments advanced in this column for the usefulness of learning 12s could as well be advanced for learning one's 24s table or even more so, ones 60s table. But the fact is, we started the 12s tables in a time when imperial units seemed to lend some (limited, IMO) utility to the practice. But I need my students to be able to perform their times tables so that they can handle the algorithms of multiplication and fractions. I will even go so far as to say that I believe teaching to the 12s has a retarding effect on many students' understanding of higher multiplication.