Being in the teaching profession for years, teachers would be able to clearly picturise the ideas and topics which
needsneed to be
highlightedincluded in the education programme
For example, if the biology text book needs revision, teachers are the ones who can articulate the updates to be made in the biology book than a politician.
Before coming to this example, you should have shown the contrast as to how politicians would fail in such decisions. Then this example would have been more effective.
Politicians try to get popular and stay in students minds by publishing their life history in text books.
.... well, this is a weak statement. First, it is not always true too...may be some silly politicians in some countries do that, but it is not fair to generalize that they try to capture students' minds with such tricks. However, you could have said that politicians may try to inculcate their political views on children by using curriculum as a tool.