Describe your school's ESL program including the various services that are provided (America only)?

I am the ESL program coordinator for an intermediate school (5th and 6th grade) in Texas. I've been running the program a specific way for the past two years, but I have found that there are some flaws. I would like to have some ideas about different things I could do to present to my new principal within the next few weeks. Also, the population I serve can vary from year-to-year. For example, my 1st year, I had several beginning-level ESL students, so I primarily concentrated on helping them. Then my 2nd year, I had none, so I spent more time helping advanced-level students.

Like I said, if you have an ESL program at your school, please describe the services it provides and how it implements these services.