I ran across this great post on using Socratic Questioning in the math class that identified the six types of Socratic Questions and then proceeded to provide specific examples of what these look like when learning math. Click here to check it out.
When paired with the Padlet iOS or Android app, you could really leverage the ability to get students having math conversations. Just pose a question and have pairs of students use the video option to make a "Selfie Video" responding to a Socratic prompt. Boom...instant math conversation.