Dagga distracts the learner from academics and shifts his or her focus to their next fix or sale. It trumps all other issues demanding their attention and time. This will inadvertently lead to a drop in marks.  Because the drug trade is so competitive at high school level, this often leads to fighting and violence among learners who act as distributors for dealers.

Marijuana use in adolescences has long-term effects that are far reaching into adulthood that needs to be considered.

Several studies have linked marijuana use to increased risk for psychiatric disorders, including psychosis (schizophrenia), depression, anxiety, and substance use disorders.

Marijuana use has also been shown to worsen the course of illness in patients who already have schizophrenia. Marijuana can produce an acute psychotic reaction in non-schizophrenic people who use marijuana, especially at high doses.