"Can everyone read that? What about the people at the back?"
"Is my writing big enough?"
"Don't be shy. I know my handwriting is awful, so tell me if you can't read anything"
"Is that colour okay?"
"Please tell me if the reflection on the board is a problem"
"Do you know what this word means?"
"Can I wipe that off now?"
"Has everyone finished copying it down?"
"Have you finished with this part? Can I erase just this section?"
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