Kroy Biermann aced a good parenting test in the midst of his nasty divorce with Kim Zolciak ... and turns out he completed the course before she finished a similar one.
The former NFL star completed a mandatory course in Georgia -- "Parent Education For Separating/Divorcing Families" -- last month and he scored 99% on the quizzes and final exam.
Kroy filed a certificate of completion with the court, obtained by TMZ, and he got his work done before his estranged wife did.