While looking for a home in Tucson, a family came across school scores listed on property pages and asked a question: what exactly are these numbers based on? Seeing a 10-point school and a 1-point school in the same area only deepened their curiosity.

In Tucson, there are schools like BASIS Tucson Primary and Sunrise Drive Elementary School that received a score of 10 according to GreatSchools, while Tanque Verde High School and Catalina Foothills High School scored 9. In contrast, Arizona Online Charter School has a score of 1. These figures are based on GreatSchools data as of August 2026. However, the last school is an online charter school, which is unrelated to the neighborhood.

So how exactly is this score calculated? GreatSchools creates four categories: test scores, student growth, college readiness, and equity, and then averages them with different weights. According to GreatSchools' official methodology document, test scores and growth are given a weight of 0.45, while the other categories each receive a weight of 0.27.

The college readiness category reflects scores from college entrance exams like the SAT or ACT, graduation rates, and the completion rates of advanced courses like AP or IB. The equity category looks at how much improvement is seen over time among lower-performing student groups. Essentially, multiple layers of data are combined into a single number.

So why is there such a large difference in scores among schools in the same neighborhood? The biggest reason is that the types of schools differ. Charter schools, magnet schools, and traditional public schools have different methods of attracting students, which directly affects their test scores. Comparing them solely based on scores can lead to misunderstandings.

When Korean families look at school districts in Tucson, it's better to check the breakdown of scores rather than just the overall number. It's important to consider the student-to-teacher ratio, whether scores have been trending upward in recent years, and what reviews from parents of current students say to get the full picture.

It's also easy to overlook that the schools listed on the site may differ from the actual assigned schools. This is especially true in areas like Tucson, where school district boundaries are defined by roads or specific parcels. Once you have a specific address in mind, it's safest to check the assigned school directly on the district's website.

• Have you looked at the four categories that make up the score (test scores, growth, college readiness, equity)?
• Are you comparing schools of different types (charter, magnet, traditional public)?
• Have you confirmed the actual assigned school based on the address on the district's site?
• Have you considered the student-to-teacher ratio and recent grade trends?

The score is a compressed result of various data points. By taking a closer look at the original data before it was compressed, the meaning of that number for your family becomes much clearer.

The same goes for those moving to Tucson from other states. While Arizona property taxes are generally lower than in other states, school-related bonds or special assessments can vary by county. It's wise to double-check the actual amounts with your closing agent or title company before finalizing any contracts.

So what's the next question? After checking the scores, visiting the school in person is also a good idea. Utilizing open houses or school tour programs allows you to experience the classroom atmosphere that numbers alone cannot convey.

This article is not investment or legal advice, and it is recommended to verify the assigned school and district boundaries with a real estate professional before finalizing any contracts.