[bread_baker]

I can't imagine how difficult that is! I sympathize with you! And I thought I had difficult classes...
Here are some ideas.
1. Is there any way to find out what their listening and speaking skills are? If that was done already, great. If not, you will need people to help you conduct some assessments. After you have that data for each student, break the class up into groups (maybe a maximum of 30 or 32 in a group), and each group contains students of one skill level.
2. You have some good ideas, but you will need to use them differently. Within each group of 32, make 8 subgroups of 4. Then have activities that 4 people do together. Survey activities are great. For those, maybe you use 4 subgroups of 8.
3. Because many students can't see the board, I suggest handouts. I know that's a lot of copying, but maybe that is what you need to use.
4. The school needs to install a sound system and give you a microphone.