You need to make a plan before writing an essay and know what you will write in every paragraph. Also every paragraph should be written using the same pattern: make a statement, explain it, provide examples. Then your essay will be sufficiently long.
"The overwhelming and critical national problems are the extremely high failure rates in high school English and Mathematics and the disengaged male," the Coalition says. "The BGCSE data support this conclusion. Not facing this issue merely causes the problem to grow year after year."