A "Solution" essay is just another name for this sort of paper assignment. Before you start to explain the solution, you will need to describe the problem in a paragraph or two, giving examples. Then you need to explain how you would solve that problem, step-by-step. Finally, you will need to argue against any objections and explain why your idea is feasible, cost-effective and a better solution than other ideas. To find ideas for solutions, you can research other people's ideas, ask friends or family for their ideas, or just think about how it could be done better.