Cada maestrillo tiene su librillo

[ROBINDESBOIS]

Is there an equivalent for this idiom in English?
Meaning . every teacher has his own way of teaching.
It applies to any job.

[Rusty]

To each his own.
One size doesn't fit all.
Different strokes for different folks.
There's more than one way to skin a cat.

Each means that there's more than one way to do something (or to get something).
Hay muchas maneras de matar pulgas.
Para gustos, los colores.
Cada cual a su manera.

[JPablo]

Claro, y mira las opciones que se dan en la sección de "idioms":

http://www.tomisimo.org/idioms/es/sobre-gustos-no-hay-nada-escrito-130.html

Saludos cordiales.