I agree with Zac's statement, however, it is unclear from your question if you wanted a past tense or present tense sentence. So, if you want past tense, Zac's answer is correct (The child was taught to do so.). But if you want present tense, "The child is taught to do so." is correct. An example of the present, ongoing tense would be:
Is that child taught to read English and Mandarin? Yes, the child is taught to do so.