Recently, a family I consulted was looking for a home in Dallas and dismissed a neighborhood entirely after seeing that a specific elementary school had a score of 4 out of 10. However, upon checking the actual assigned district for that school, it turned out that the property they were interested in was actually assigned to a different elementary school in a neighboring area. They almost missed out on important information by judging the entire area based on just one score.

The school scores you see on sites like Zillow or Redfin are mostly ratings given by an organization called GreatSchools. They are rated on a scale from 1 to 10, and this single number incorporates various factors. According to GreatSchools' official description, this rating reflects test scores, student progress, and for high schools, college readiness as well. For elementary and middle schools, test scores and student growth each account for half of the rating, while for high schools, the three factors are roughly divided into thirds.

What's important here is student growth. It's not just about how high the test scores are for that year, but how much students have improved compared to the previous year. Therefore, if you only look at test scores, you might mistakenly undervalue schools that are actually doing a good job of helping students improve. Recently, an equity indicator has also been added, which looks at whether students from diverse backgrounds are achieving good results equally.

Within Dallas, there can be significant score differences depending on the neighborhood. In one case I looked at, Lakewood Elementary and University Park Elementary both received perfect scores of 10, while Northlake Elementary scored 6 and Frederick Douglass Elementary scored 4. Even within the same city, the situation can vary greatly depending on the area.

If your child plans to attend high school in the area, you should also consider the college readiness category. This category is assessed based on college entrance exam scores like the SAT or ACT, graduation rates within four years, and participation rates in advanced courses like AP or IB. The assigned districts for elementary schools and middle/high schools do not always align, so it's wise to check the assigned schools for each level separately before moving.

For investors considering purchasing properties for rental income, school scores are also a factor worth considering. Recent market trends show that areas with high-scoring school districts generally have steady rental demand, but making purchasing decisions based solely on one score can be risky. It's realistic to also consider property tax rates, rental yields, and future market trends.

There are additional factors to check beyond scores. First is the trend of the ratings. By looking at whether scores have been rising or falling over the past few years, you can gauge the direction of the school. Second is the student-to-teacher ratio. A lower number indicates that teachers can give more attention to each student. Third is reviews. While scores focus on test results, reviews contain qualitative information about the school environment and communication styles.

• Check the school district map to see which school the address is actually assigned to
• Look at the score trends over the past 3-5 years
• Review the student-to-teacher ratio and school reviews

School district boundaries change more often than you might think. Before signing a contract on a home, don't just trust the school names listed on real estate sites; make sure to verify the assigned school for that address on the official district website. This article is not investment or legal advice, and I recommend consulting a professional before making any actual contracts.