Note: the following information was researched in April, 2012. It can be changed at any time, so check with both the Issaquah or Bellevue school districts be be certain.

The 41.5 neighborhood is cut in half, with the upper neighborhood belonging to Bellevue School District and the lower neighborhood is Issaquah School District 411 according to these boundary maps:
High School
Middle School
Elementary School

They all essentially look the same as this illustration from the elementary school map:

Issaquah Schools would be Sunset Elementary, Pine Lake Middle and Issaquah High.

Bellevue Schools are Spiritridge Elem, Tillicum Middle and Sammamish High.