1 Reply Latest reply on Jun 29, 2016 5:10 PM by Chrys C.

    Invalid pin for dummies- basic math & pre algebra

    kHIARRA MANJARREZ

      I ordered the two books in one- basic math & pre algreba books that came with a one year subscription online. When I tried to activate it, the pin kept saying it was invalid??? Why isn't it working. That is the one of the reasons I purchased it.