Greetings!
Thank you for your suggestions. The trouble is that I do not only have oversized classes but also mixed ability classes. I have students who barely know how to tell me their names and age in English, and others who know how keep a simple conversation going. Besides I have highly motivated students paired with highly unmotivated students, which makes everything even more difficult. Last year I tried to organise them in groups and hand out different tasks according to their proficiency level, but this year I only have one 90m class a week, and an official very long curricula.
I never felt so impotent and frustated as I do now...
Thanks for 'listening'!
ana