By Eve Zuckoff The teen brain has long been an enigma to parents, but in recent years it's also become a hot topic for brain researchers. One thing they’ve learned is that teens aren't just inexperienced adults. The teen brain is still developing , and the result is a unique set of both strengths and potential weaknesses for teens and their parents to work with. “The brain is actually constructing its most important elements during the teen years ,” according to Frances J ensen, chair of the