As your question deals with different issues, I will answer it in separate postings. Here I will look at issues to consider when teaching and in the next post, I’ll discuss your question about what to leave behind.
If you haven’t yet put together your classes, you should try to group the primary age children (5 to 10) by age. At primary school age, a year can make quite a difference to skills, general knowledge and interests. If your children are grouped by age, it will be easier to find a topic that they all like. For the 11 to 15 age group, you should group them by level, except try to avoid putting the two extremes of age into the same class.
The best thing you can hope to do is to leave the children with a positive attitude towards learning the English language. You should encourage and praise all their efforts and try to handle errors sensitively. If errors are not handled sensitively, they may be wary about trying to express themselves. If you can instil in them a positive attitude towards English, they will want to continue studying afterwards, possibly alone or with another teacher.
With the 11 – 15 year olds, you should give them plenty of opportunities to speak and listen to English. You should aim to cover the basic structures; e.g. introductions, likes and dislikes, abilities. You could use information from outside the classroom; e.g. the museum is on the left, it’s far from the church; the church is very old. I don’t know what level they are, but at a higher level, you could take them out of the classroom and really use this language. However, don’t spend too long on this as your time is limited. A good course book to use on short courses is Accelerate. It exists at various levels and contains topics that interest teenagers. You could also look at some of my previous posts about teaching teenagers, including the one on 16 November 2004.
With the younger children, it’s a good idea to choose a story and to base your language teaching on the topics contained in the story. For example, if the story is about mealtimes, you can teach language of food, likes and dislikes, the names of the different meals, vocabulary around the table e.g. knife, plate. You can play games and teach songs related to the theme. For more information about teaching primary, you can look at my replies on March 26 2004, April 18 2004, June 20 2004, October 10 2004, December 3 2004 and October 5 2005.
If you have any further questions, please write in again. I think this sounds like a really interesting project and somewhere where you have the opportunity to make a real impact on the children’s future.