Maybe record the teachers as they teach; as a way to produce content?

There may even be a good-enough auto voice->text transcriber for Portuguese?

A double bonus would be having the teachers review the recording/transcribing -- as some teachers (if not all of us), improve after checking recordings of what we do

Blessings on your efforts

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I was sitting beside a very impressive Ecuadorean teacher today, with refugees

Sometimes larger change is need for society. Something like having older children teach younger children has been effective in recent history

My most effective technique to-date, has been to pray