We do two or three workshops a year on "collapse days" meaning the kids don't have normal lessons.
Just before Christmas we go in with the police and a Theatrical production and do a big drive with yr 9 around staying safe with alcohol. They see a play - have a discussion - do a wrokshop with the police around alcohol and anti social behaviour and the law around drugs/alcohol, then with us talking about long/short term effects, physical mental health etc etc.
We show then what a unit of alcohol is - get them to pour it out - get them to pour out what they normally drink - compare the two - go through government guidelines - show them a DVD of a liver transplant - talk about the pathway to addiction - why people drink - thats its okay to drink to have fun but not to cover up things that make you feel bad. Where to access help (we have "drop-in" clinic in all schools in the area once a week where the YPs can ask an drugs advisor any question they want - have support in cuitting down - have support if they have an adult in their life who is misusung drugs or alcohol). We refer into other agencies including SS and CAMHS. We help YPs understand addiction, build self esteem, help then use their anger postively. A lot of the time we just listen. We suggest ways to avoid peer pressure, and we help them to see how they can avoid repeating patterns of behaviour and making the wrong choices for them.
With other drugs (alcohol is a drug that stands alone because it is such a massive, far reaching problem)we will tailor a workshop to what the YPs are learning in PSHE, what we know the YPs in that school are using, what we know is available in the area, what the current trends are(we have intel from the police. We are doing a lot of work Ketamine and GHB, GHL, (various NRG's legal highs etc atm).
We go through each drug,what they look like, how they are used, how it affects the brain, how it makes you feel, the law, the long and short term affects, how addictive it is, whether is is physically or mentally addictive, what the dangers might be, what might happen if you mixed it with other substances and if you are intent on using it - how to do it safely.
Amongst other things - hope that answers your question.