How does cannabis affect school performance?

Cannabis use can affect school performance, above all through concentration and memory. Frequent cannabis use disrupts concentration, which can also lead to problems at school and in training. In the worst case, a school or vocational qualification is at risk because memory works less well. This article shows which connections the sources support, where research is still open and how teachers can address learning problems.

Concentration and memory in lessons

Learning depends on attention and the ability to retain. The BIÖG's specialist page on dangers for young people names impaired concentration. The young brain is in an important stage of development, and according to the specialist page, THC disrupts maturation processes in the brain.

In lessons this often shows first. A pupil loses the thread of an explanation, forgets homework or cannot remember a block of vocabulary. Such signs are not automatically an indication of use. They are, however, a reason to seek a conversation, as the article How does a teacher raise cannabis use with a pupil? describes.

What an early start means

Age plays a role. According to cannabispraevention.de, the harmfulness of cannabis depends on the age of the person using it and on how often they use it. Drugcom reports brain changes in people who started smoking cannabis before the age of 18. According to drugcom, the question of cause and effect has not yet been fully clarified, and it has not been conclusively established whether the adolescent brain can recover.

For practice this means that teachers should observe changes over a longer period and not judge a single incident.

What recovers after stopping

The situation after stopping is nuanced. According to drugcom, a study of 88 participants aged 16 to 25 showed that memory performance improved as early as the week after the last use. The source adds that it is unclear how lasting such changes are. This is an important caveat that teachers should not gloss over.

The Swiss specialist service Sucht Schweiz also writes that memory and concentration losses in some heavy long-term users usually disappear when use is stopped. The service speaks of some cases only. According to these sources, improvement after stopping is possible, but it cannot be promised.

Motivation and performance

Motivation also plays a role. Sucht Schweiz notes that cannabis can dampen motivation during intoxication. According to the same source, a lasting amotivational syndrome is not confirmed. For school this means that a decline in enjoyment of learning may be linked to use, but it does not have to be. Counselling clarifies the cause.

Learning problems often have several causes. Stress, lack of sleep, family conflicts and psychological strain all play a part. Anyone who looks only at consumption quickly overlooks the other causes. School social work can widen the picture and involve the family.

How schools address learning problems

It is best to raise learning problems as a change. Describe the period and the concrete observations: grades, participation, punctuality, withdrawal. Then ask about the causes without prescribing them. A sentence such as “I get the impression that learning is hard for you at the moment. How do you see it?” opens the conversation.

If there is a suspicion of consumption, stay on the matter. Explain the connection between concentration and school performance, and offer support. The specialist page for teachers recommends addressing young people in a factual and differentiated way. Playing down is a typical problem here, and you should name it openly.

Support for pupils and parents

Anyone seeking help will find counselling. The Sucht und Drogen Hotline can be reached on 01806 313031. The parents' helpline of the Nummer gegen Kummer advises parents on 0800 111 0 550. The DHS addiction-help directory (Suchthilfeverzeichnis) lists counselling services by postcode. Drugcom also offers a cannabis check, with which young people can assess their own use over the past twelve months.

Schools can also involve school social work. It can discuss learning problems with those affected and refer the family to suitable services. The article What role does school social work play in cannabis cases? explains its tasks in detail.

Learning support and small steps

When learning problems arise, a concrete plan helps. Agree on goals that can be reached in two or three weeks, for example a participation grade or regularly completing homework. Small, checkable steps are easier to monitor than large resolutions.

The plan should be supported by the person concerned. Ask what support they need and whether study times, group work or tutoring suit them.

When learning problems need counselling

Not every learning problem points to use. However, when several signs come together, counselling is worthwhile. These include a sharp drop in performance over months, withdrawal from friends, repeated absences and growing indifference to goals that used to matter.

Drugcom names a rule that helps with the assessment. A dependence is present if at least two criteria apply within 12 months. This is a guide and nothing more. The specialist service clarifies what applies.

School social work can discuss the situation with the young person and involve the family. It also helps to combine learning support with counselling. The Sucht und Drogen Hotline on 01806 313031 offers additional advice on questions of use. Parents find help through the parents' helpline on 0800 111 0 550.

What you can do next

If you as a teacher notice a change, document it briefly and soberly. Then speak with the person concerned and, if necessary, with the parents. Plan an appointment in a few weeks to check whether anything has changed. This keeps support concrete, and the pupil experiences reliability.