2 things wrong.

8th grader? Cell phone?

Not unless the eigth grader is independently wealthy.

Pass math?

My soon to be fourth grade daughter is well into division, multiplication, starting to understand algebra and geometry.

My first grade son can do addition and subtraction when he settles down long enough to think about it (No, he's not ADHD, he's a 6 year old boy!)

Did the schools teach them this? They helped, but Mom and Dad pick up where school leaves off.

If your child isn't learning, barring any medical issues, it might be time to look in the mirror.