This is a post I wrote in direct response to your ...ahem, "teachers" irresponsible dissemination of incorrect information.
The title of the post is Information about the Abused Becoming Abusers
Contained within that post is the citation for the original research study from which that erroneous and deleterious conclusion was drawn.
Additionally, there is a link to a paper which discusses the faulty research and where the research failed, step by step. It then tackles the "conclusion" of that research and it discusses the inappropriateness (poor research methods) of generalizing a conclusion from the target population to the non-target population.
Information debunking the original research starts on page 4 of the article.
The .pdf can be downloaded and printed if you wanted to share it with anyone.