I'm going to write a paper about the psychologist Piaget. He divided the cognitive development of children into stages.
This is my thesis statement:
'Developmental psychologist Piaget was the first person to divide the cognitive development of children in stages, each with distinctive characteristics.'
Is it good or do you have suggestions for improvement?
Please let me know,
Maybe introducing "separate the cognitive development of children in two distinctive stages" into your sentence makes a difference.