It is a time of rapid brain growth and neuronal fine-tuning when young people are especially sensitive to social cues and rewards. When a young brain is looking for experience, teachers, parents and other influential adults should seek to capitalize on the richness of learning and stave off negative experiences such as smoking or drug use. A sensitive period for social and emotional processing also suggests that certain phases of adolescence may be more opportune than others for certain approaches. Likewise, a sensitive period for language acquisition explains why people who learn a foreign language after puberty typically have an accent. Sensitive periods for social learning have been harder to pin down.