USA - All students must show

wrote:
In the U.S. instructors only need to maintain a record of test
recommendations, solo endorsements, and pre-solo written tests.

IIRC, when an instructor goes to renew the license every two years, and perhaps
for insurance, they want to know how much time and number of flights were spent
instructing. For that, best to keep it logged.

Jim Vincent
N483SZ
illspam