assume you are the principal of your school write a letter to the parent of your school children requesting them to pay their school fees before the exam commences

Parents,

this is a kind reminder to please pay your child's school fee before exam season starts. If you haven't paid, your child will be unable to take the tests, and will not be able to keep studying in this school.

you   can   protest   and   boicot   and   have   marches  

there is a sequence and logical steps to give an answer of a trouble.

1) strategy is necessary to develop an project idea.

2) to study and know the environment where you are going to work ( ecosystem).

3)   the materials resources to built the ideas.

4) to give a priority order in the context that you study. in this case human needs.