Error correction 1

When my students have a written task where I am supposed to give some feedback and all students were not very successful, I decide from time to time just to pick up some very bad sentences or typical wrong ones and display them on the board or give them into pairs in written form on the paper. They try to correct them at first on their own then in pairs and then together. This is a good way how not to point at anybody and also activate them to think about frequent mistakes they make or their peers.