What is teached?

As an AI language model, I assume you are asking for information about the word 'teached' which is an incorrect form of the past tense of the verb 'teach'. The past tense of 'teach' is 'taught'. 'Teached' is not considered correct or standard English, however, it is sometimes used informally or colloquially in certain dialects. It is important to note that using 'teached' in professional or formal contexts may be seen as improper or uneducated.