Top Figure: Studies show that marijuana interferes with attention, motivation, memory, and learning. Students who use marijuana regularly tend to get lower grades and are more likely to drop out of high school than those who don’t use. Those who use it regularly may be functioning at a reduced intellectual level most or all of the time.
Most Marijuana Use Begins in Adolescence: 78% of the 2.4 million people who began using in the last year were aged 12 to 20.1
As perception of harm decreases, teen marijuana use increases.2
Every Day, 3,287 Teens Use Marijuana for the First Time1
Bottom Figure: Marijuana may hurt the developing teen brain. The teen brain is still developing and it is especially vulnerable to drug use. Regular heavy marijuana use by teens can lead to an IQ drop of up to 8 points.3
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