It doesn't matter how large or small the school is. It doesn't matter how many students there are, or the number of grades per teacher—or even how many grades are in one classroom together. Children achieve at the same high level—an average of half a grade above predicted in all subjects.

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This is according to CognitiveGenesis, a 4-year study conducted at La Sierra University following 30,000 students, grades 3–9 and 11, enrolled in Adventist schools across the United States.