I'm not exactly clear on what you are asking, but if you are asking about the elementary and middle schools for a certain property, you should start your research with this website from the Sunnyvale School District: http://www.schvision.com/schoolfinder3/sunnyvalesd/Default.aspx
But be sure to also call the schools to clarify and confirm information, because it is not clear when these sites are updated.
Further, school districts are "re-zoned" once in a while. I do not know how this works for each district, you may want to contact a school district (especially the school district you are hoping your children want to attend) to find out more information about this.
I hope I have answered your question. Please feel free to ask again, if I have not.