Got a random text from the ex...?

Askin me for the answers to some questions for a class she's in that I previously took. Tried to reinitiate contact before this happening, but got no response. Stopped for a while, then ended up getting the text about a month later, kinda praising me a bit for helpin her out. Asked me if she'd see me around at school. Now I don't mind helping people out with homework, but for all you pros at dating, is this a green light?