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"Enseñarle" is a form of "enseñar", a transitive verb which is often translated as "to teach". "Teoría" is a noun which is often translated as "theory". Learn more about the difference between "enseñarle" and "teoría" below.
enseñar(
ehn
-
seh
-
nyahr
)A transitive verb is a verb that requires a direct object (e.g., I bought a book.).
1. (to educate)
a. to teach
Perder su trabajo le enseñó a ser más trabajador.Losing his job taught him to be more hardworking.
la teoría(
teh
-
oh
-
ree
-
ah
)A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).