Translate the following English sentence to French:
"It is a fixed-term agreement with an impact inside and outside schools, providing guidelines for educational practice as well as information for the public and serving as a planning instrument and a yardstick against which the development of a school can be measured."
C' est un accord limité dans le temps, efficace à l' extérieur comme à l' intérieur, comme soutien d' une action pédagogique, comme information pour le public, comme instrument de planification et comme échelle de mesure de l' évolution de l' école.