I find the question a bit of a joke to be honest.

Nothing can be done, when someone commits suicide it is usually because they are desperate and no measure like education in schools is going to prevent that. I tell you this having known two close cases.

What would be effective against that is not going to happen. In societies where people don't have enough to eat, and spend every day trying to survive, suicide rates are practically unknown. It is when people have a secure life that they start worrying about other things and suicide increases. Not to mention pseudo-suicidal behaviors, such as getting up to your ass in drugs and climbing the railing of the top floor of a skyscraper to take a cool picture and upload it to Instagram.