Plants in your classroom

I'd like to put plants in my classroom this year and wondered if anyone already does this. I want to make environmentally-conscious thinkers out of my students, and thought I'd start with greening up my classroom. Any ideas on what would be good plants for my room that won't require too much work? I do have some natural light in my room, but I'm not sure where to go from there. Any ideas would be great. Thanks!