you don't retake it anymore. Did your child fail or just not get Pass Adv (and you want the kid to go to Alg. in 7th)?
Those who were eligible to retake had to be in the 375-399 zone (just below passing). Other kids don't retake it -- especially in ES -- b/c it does not keep them from passing on to the next grade. In HS, kids have to pass a certain number of state exams in order to get a diploma. They do re-takes all the time. But, ES kids... no.