I teach go around before I teach landings for 2 reasons
1) To ensure the student is proficient in actually flying a safe go around
2) To encourage the mindset that a landing does not necessarily have to be the end result of an approach to landing and that rather than force a bad approach the student will have the confidence to go around
Before the start of the first circuit lesson I go to the practice area and have the student fly a few practice circuits with a notional runway at 1500 feet AGL. This allows the student to practice attaining and maintaining the correct pitch/power/airspeed/trim/balance for each leg of the circuit and develop proficiency in flying a proper go around.
So to answer the OP's question, my students will have done at least 3 or 4 go arounds before their first landing.