Here's why:
* It introduces the main idea: The sentence states the main point about Springfield Academy, which is its reputation for excellent education.
* It sets the stage for further development: The sentence makes you curious about what specific details or examples will be used to support this claim about the academy's high-quality education.
Supporting sentences would then provide evidence, examples, or details that expand on this topic sentence. For example, you could write supporting sentences about:
* Specific academic programs at Springfield Academy
* The school's impressive student achievements
* The dedication and expertise of its teachers
* The high standards and rigorous curriculum