We recently left Germany where our son had spent most of elementary school and become bilingual through total immersion.
We are interested in obtaining German language textbooks, addressing German subjects like grammar, writing, and reading comprehension (i.e. the range of subjects that would be in an "English" class in an English speaking country) that German children in middle school actually use. Those are the appropriate difficulty for him, not German books for English speakers.
For a while a friend in Germany made photocopies from her daughter's textbooks and sent them on, but it is too much to ask for her to do that constantly.
Does anyone know where I can purchase these? Or if the government makes available PDFs or something?