It's a reduced relative clause. The full thing would be "I hear there is a deaf and blind child who / that is being educated at the Baltimore Institution". The voice is passive, as GuideDog has said. Bonus: Take another look at your question. You forgot to use inversion, and you also forgot to include the object of "we use".

It's passive. You could say ...the Baltimore Institution is educating a child.

Stop being stupid. I was only being myself. My dog was being his usual stupid self when he destroyed the porch.