Hands on lectures

Doing things hands on in a classroom would be more educational for students. I say this because students get bored very easily and need to be motivated to learn. If they sit in a classroom all day long with a teacher who does nothing but lecture, it is going to be very easy for them to drift off into their own little world. To keep them focused on the topic why not do the same lecture, but with some thing hands on. For example, if you are talking about the civil war in history why not reenact it? If you are in math and want to know how tall a tree is when it casts a shadow 10 feet long why not go outside and figure out how tall a tree is that way? There is something that you could do every week in a classroom that would be hands on. This is also good leverage for a teacher who has students who like this type of learning because if they do not behave then they do not get to do the hands on lecture. I am not saying to do this everyday, but maybe every other day or twice a week would be good enough. I think that this would be a good way to keep students motivated to learn and maybe if they like this enough it will keep some students in school were they need to be instead of dropping out.