Was heißt »Lehrmeister« auf Englisch?

Das Substantiv »Lehrmeister« lässt sich wie folgt von Deutsch auf Englisch übersetzen:

Deutsch/Englische Beispielübersetzungen

Das Leben ist der beste Lehrmeister, aber gewöhnlich zu teuer.: Life is usually the best teacher, but usually too expensive.
Die Kinder sind die wirklichen Lehrmeister des Lebens.: Children are the true teachers of life.
Google ist mein Lehrmeister.: Google is my teacher.
Ich hatte einen guten Lehrmeister.: I've learned from the best.
Bewundernswert! Sie spielen nicht den Lehrmeister, obwohl Sie vieles besser wissen.: Admirable! Don't preach although you know a lot better.
Das Leben ist dein bester Lehrmeister. Höre gut zu, was es dir sagt.: Life is your best teacher. Listen carefully to what it is telling you.

He has a master's degree in mathematics.
I am master of all the birds in the world, and have only to blow my whistle and every one will come to me.
It is in self-limitation that a master first shows himself.
Studying a table of Russian paradigms, Mary unconsciously knitted her brows and scratched her head. She marvelled that most Russian six-year-olds master the noun declensions with little apparent effort.
She recognized the master spy with multiple identities when his wig fell off.
Marriage is a community consisting of a master, a mistress and two slaves, making in all, two.
When I was twenty two years old, I was the master of the breast stroke.
I have a master's degree in mechanical engineering.
The art of losing isn't hard to master.
He waited for his master.
Tom is a master of disguise.
Interrogative pronouns can be difficult to master in a foreign language.
I want to master Swedish.
A cat doesn't accept a master.
I want to master a foreign language.
He is a master of disinformation.
Like master, like disciple.
This Shaolin monk is a kung-fu master.
She got her master's degree three years ago.
When apprentices complained that they got more harassment than training from their employers, Granny said calmly: "Well, time spent in apprenticeship is not like time spent being the master."