The Montessori philosophy is built upon the idea that children develop and think differently than adults; that they are not merely "adults in small bodies". Dr. Montessori advocated children's rights, children working to develop themselves into adults, and that these developments would lead to world peace. The Montessori method discourages traditional measurements of achievement (grades, tests) under the premise that it is damaging to the inner growth of children (and adults). Feedback and qualitative analysis of a child's performance does exist but is usually provided in the form of a list of skills, activities and critical points, and sometimes a narrative of the child's achievements, strengths and weaknesses, with emphasis on the improvement of those weaknesses.