I had similar small classes last year.
My school suggested I use workbooks with them, basically books where each chapter has a reading passage they can read out loud, and then they answer workbook questions about the passage. If you find a good one, they can practice reading, writing, listening, and speaking. Shy kids might like something structured like this. I used Reading Juice for higher level elementary kids. Reading Monster might be good for kids who need to work on the basics. Just ask your CT if they can order the books for you. The CT might have some suggestions for workbooks too, and there might be some lying around your school already.