Most of these sites have resources to help a tutor create a lesson plan, print worksheets or learn teaching techniques. They may also have practice sections you could use with your students either in class, or as assignments, assuming the student has access to a computer and the internet.
ProLiteracy Education Network: This is a good site to start with as a beginning tutor. There are many resources for both tutor and student. The focus is on literacy in general, but many specifics on ELL. Some specific features include TPR, Preparing for Citizenship, etc. If you need help logging in, please ask Heather for help.
ESL Gold: This is a very rich site, with tons of resources for both students and tutors. All levels of ability are addressed and lessons focus on many types of skills.