They learn the techniques quickly and find 'computer pals' everywhere. They benefit from the international contacts they make and from the language instruction. The problem is that after they've introduced themselves and told about hobbies there isn't much more to say. No, this type of contact must be a result of school oriented impulses. For the teacher to manage this much needs to be explained.
Most international contact is done in English.
When you work with schools in English-speaking countries it's important that your partners understand that English is primarily a subject and not a language for your pupils. To be asked to write a letter in English is seen as a school assignment. New problems are always cropping up. This is time cunsuming and time is a resource schools don't have in abundance. Tests and exams are always right around the corner and many students need individual help.