Michigan re-launches the public awareness campaign called "21 to Buy, Not Supply". The purpose of the campaign is to curb underage drinking and inform about the consequences of supplying alcohol to minors. A similar campaign was launched in 2014 and it is now re-launched as a statewide college campus campaign. It mainly targets college campuses.
Drugs and driving do not make a good combination. This is also true about marijuana. Remember, just because it is legal to use marijuana in several states; it is not legal to drive while impaired.
Almost all driver's manuals or handbooks have information about the shapes and colors of traffic signs. It isn't always obvious why you need to learn this. But being able to identify signs from a distance by just the shape or color coding, can help you a lot.
You also need to know this for your written knowledge test.
If you are under 21 years, it is important that you understand the zero tolerance law. Even a small amount of alcohol can easily put you at risk. It is also important to know that a conviction based on blood alcohol content is more or less automatic. No other proof is needed. And remember, any traces of alcohol in your blood may result in a conviction.