If you have access to a computer lab, there are many things you can do with your students! I have some suggestions for you even though I do not know the age and level of your students.
You could have them participate in discussion forums on the Internet. You could create your own forum or you could have your students participate in an already existing forum.
You could have them participate in a tandem exchange. This consists in exchanging e-mails with other students of another country. Ideally, you have them exchange e-mails with English native speakers who want to learn French.
You could also work with authentic materials (audio, video, written texts, etc) on the Internet. They are easily accessible and not expensive!
All these activities could allow your students to use English in meaningful situations, to discuss with native speakers, and to work with authentic materials.