I believe our district started timed math in 2nd, with addition and subtraction. For third, DD's teacher required 100 problems in 10 minutes in each of addition / subtraction / multiplication to pass, and 100 problems in 5 minutes to be excused from further timed drill. (Unfortunately for DD, the fastest she could physically write that many digits, even without the need to do the calculation, was 7 minutes. Getting under 10 minutes with recall was a struggle.)
In 4th, they did timed division drill, but it was an easier standard - 20 problems in 2 minutes, with all problems from the same fact family.
