[Mr. E English]

Seems to be getting worse every minute Eric and I would question whether it's actually possible to teach a mixed nationality group at such different levels. Sounds like your school needs to step in and help you out - regroup the students according to ability / provide extra remedial lessons / assign a classroom assistant!

Six months difference in learning at a intermediate level and above is manageable in the classroom, at pre-intermediate it's difficult but just about possible, but at elementary I don't personally think it's possible.

If I think of my elementary level students the complete beginners are doing "My name is ... / this is a pen" while six months later we're starting on past simple - that's a big difference.