Secondary Education Interruption

<p>I took a gap year after having graduated from high school in 2008. The Common App has a section that asks you to upload a document explaining more about my time off:</p>

<p>"If your secondary school education was or will be interrupted, check all that apply and provide details in the Additional Information section or on an attached sheet"</p>

<p>I was wondering if anyone knew how long this should be? Should this be like an in-depth essay of 500 words like the Common App main essay?</p>

<p>Thank you so much!</p>