The shorter version your statements have, the better.
The core of thesis statements is a definable, arguable claim, which contains valuable information for your readers.
It should end up with the writer’s suggestion to keep on reading the essay to explore the problems and find the most effective solutions.
Not all education web resources provide information on how to compose a good thesis taking into account the type of essay you need to write.
It is very important to distinguish between different types of statements as each of them has its own peculiarities.