The boundaries of a school district can be confusing at best and are probably best defined by the district itself. Our recommendation is to contact the district office to be on the safe side.
Many people have been victems of misinformation provided by well intended sources. Owning a home in an area that turns out to be the wrong one can be an expensive mistake. The school is the best source for this information.
Your Question states the zipcode 91756 which is the city of Monterey Park but the zipcode on your profile reflects 91765 which is DIamond Bar. Just want to make sure if you are asking about Monterey Park or Diamond Bar. The school your child will attend all depends on where you live within the city as well as his/her grade level (i.e. pre-school, elementary, middle, high school)
Since I'm not sure which city you are requesting, here is a link you can use to help find your answer.
If you have any questions please feel free to ask me