This concept is the theme. It implies that this is a predicate verb. Educational opportunities for all children. Of course, noun phrases as objects are not a complete sentence.
Educational opportunity is the main object, for all children is the modifier, and for is the preposition.
In addition, you made a most taboo translation mistake, that is, word-for-word translation, which is not acceptable. English is not pinyin! ! ! Not corresponding to translation. Simple sentences at the primary school level may happen to be right, but those at the university (and you are still taking the postgraduate entrance examination) are definitely not.
Pay attention to the difference between literal translation and free translation in English.