There was a family looking at homes in Colorado Springs. They saw a school rating of 8 on Zillow but a 7 on Redfin for the same address. They asked why the numbers were different.

I always give the same answer to this question. Both sites use ratings from GreatSchools, a nonprofit organization. However, they may update their data at different times, and they might source their school boundary map data from different places. This can lead to discrepancies in the numbers that may appear different by a day or two, and it's not a matter of one site being wrong.

Understanding how GreatSchools scores are calculated can reduce this confusion. Simply put, they assess students' test scores, growth, and college readiness, each contributing one-third to a score between 1 and 10. College readiness is calculated based on SAT or ACT results, four-year graduation rates, and the number of students participating in AP or dual enrollment courses. Recently, the equity metric, which measures how well students from disadvantaged backgrounds perform, has gained more weight in the scoring. This means that schools that teach all students well, rather than just the high achievers, are now receiving better scores.

Looking at real examples in Colorado Springs makes this clearer. Cheyenne Mountain High School received a score of 9, while the charter school The Vanguard School received a score of 10. Both schools have high scores, but their curriculum and student demographics are quite different. The differences are not visible just by looking at the numbers.

Therefore, making a decision based solely on one score can be problematic. Even within the same school, test scores may improve while growth stagnates, or conversely, a school may have average scores but show consistent improvement each year. You can check the recent rating changes on the GreatSchools page to confirm this trend. If a school's ratings have been steadily increasing, it's worth considering that this trend may continue, while a declining trend warrants further investigation.

Terms like AP and IB may also be unfamiliar. Simply put, AP (Advanced Placement) is a program where high school students take college-level courses and exams, while IB (International Baccalaureate) is a globally recognized advanced educational program. Dual enrollment refers to students taking community college courses while still in high school. The higher the percentage of students participating in these programs, the higher the college readiness score will be.

The equity metric is also worth noting. This metric calculates the performance gap between disadvantaged student groups and their peers. The smaller the gap, the more the school is seen as effectively teaching all students, resulting in a higher score. Conversely, a high average score with a large gap can lead to a lower equity score, which can drag down the overall rating.

In addition to scores, there are other factors to consider. The student-to-teacher ratio, reviews from parents and students, and most importantly, whether the address you are looking at is actually assigned to that school. School district boundaries can change each semester, so the school name listed on real estate sites may differ from the assigned school.

• Check the rating trends over the last 3-5 years
• Student-to-teacher ratio and attendance rates
• Reviews from parents
• Reconfirm the assigned school for the property address on the district website

In areas preferred by Korean families, there tends to be a rush based solely on scores, but living there may reveal mismatches in commute distance or school atmosphere. Families moving from other states to Colorado should also consider that property tax assessments and insurance rates may differ from their previous state. Numbers are just a starting point, and confirming the actual assigned school through the proper channels can help minimize regrets. This article is not investment or legal advice, and it is advisable to verify with the relevant school district and professionals before making any contracts.