In this case I was only including the schools in the town's unified school district, so the tax-base is identical. There are a couple of school districts in affluent areas just outside of town that each have only 1 elementary school. One school is funded to double that of the unified district on a per-student basis, and the other triple. On top of that, a lot of activities at schools are funded from donations from parents, which are obviously higher at the more affluent schools.

[edit] The two schools I mention on the outskirts of town are 6% and 8% hispanic, respectively.