One very important thing is to have a calendar that lists their goals. These goals
are often tests and exams or when they have to hand in their reports.

Then they have to work back all the way to the current date and for each day write
down what they have to do. The first thing they have to do is when they get
back home and to their room is to start working on their homework. And only
if they finished it they can go play or do other stuff.

Often homework is not the most enjoyable activity so when they learn to finish it
as quickly as possible they are free to do what they want. A clean room helps
so before they sleep they have to tidy their room as well so when they get back
home it is not cluttered at all.