((I was WAITING for someone to ask, haha. Yeah, you might figure it all out.))
"Well..." Ginny smiled again, her eyes twinkling, "You see, when I leave, it'll be because I won't have enough time to be your teacher. I'll still be around," She added, feeling the sadness of her students, "but I simply won't be able to teach."
She didn't explain why she wasn't going to be their teacher anymore. She was waiting for them to press the issue. She wanted them to try and get answers, just like she had always taught them.
In the mean time, the red head simply kept her smile on her face, kept swinging her feet, and kept looking secretive. She knew they couldn't resist. Ginny knew her students well.