Hopefully this will help to answer your question. It is taken from the following source.


FAA-H-8083-3A Airplane Flying Handbook

“There are many different types of clearing procedures.
Most are centered around the use of clearing turns. The
essential idea of the clearing turn is to be certain that
the next maneuver is not going to proceed into another
airplane’s flightpath. Some pilot training programs
have hard and fast rules, such as requiring two 90°
turns in opposite directions before executing any
training maneuver. Other types of clearing procedures
may be developed by individual flight instructors.
Whatever the preferred method, the flight instructor
should teach the beginning student an effective clearing
procedure and insist on its use. The student pilot
should execute the appropriate clearing procedure
before all turns and before executing any training
maneuver. Proper clearing procedures, combined
with proper visual scanning techniques, are the most
effective strategy for collision avoidance.”

James
ATP, CFI, CFII, MEI

"We can lift ourselves out of ignorance, we can find ourselves as creatures of excellence and intelligence and skill. We can be free! We can learn to fly!" Richard Bach, Jonathan Livingston Seagull, 1970