No, 'teached' is not a word. The infinitive of the verb is 'to teach', with the simple past tense form being 'taught'. For example 'Our teacher taught...

Can u use teached?

Teach is a verb. Taught is the past tense of teach. Teached is incorrect English.

Is teached a verb?

verb (used with object), taught, teach·ing. to impart knowledge of or skill in; give instruction in: She teaches mathematics. ... verb (used without object), taught, teach·ing. to impart knowledge or skill; give instruction.