No, ‘teached’ is not a correct word in the English language. The correct past tense of the verb ‘teach’ is ‘taught.’ For example, you would say, ‘She taught me how to play the piano,’ not ‘She teached me how to play the piano.’
The confusion often arises because many verbs in English form their past tense by adding ‘-ed’ to the base form (e.g., ‘walk’ becomes ‘walked’). However, ‘teach’ is an irregular verb, which means it does not follow this pattern. Instead, it changes its form entirely to ‘taught’ in the past tense.
So, if you ever find yourself wondering whether ‘teached’ is correct, remember that the proper word to use is ‘taught.’