Here's a
link. The story doesn't mention that it was posted along with other President's pictures, just that it was posted next to the Declaration of Independence and the Constitution, but it doesn't specify that it was labeled "Our President" or anything like that, and since the students asked questions as about why it was hung, it leads me to believe that there was no caption.
The teacher admits to being a member of the Republican party and a Bush Campaign volunteer who regarded them as pictures of the first couple, not an endorsement, and does not want to discuss them with students because she does not "discuss politics in her classroom." The article does specify that she has had the picture up since the beginning of this school year (an election year) but doesn't say whether it was up in previous years. When the students asked questions and her VP told her to answer them, she refused.
I think at worst, she's an idiot and at best, supremely naive. How can an
educator not think that prominently displaying photographs of a controversial figure (and Bush is that, even if he is President, as was Clinton in his time) won't cause a debate? I think a caption that said "Our 43rd President and First Lady" would have transmitted the message that this was, in fact, just a pair of photographs of our current leaders that should be regarded as benignly as the flag. She should at the very least be prepared to answer questions about it and guide her students in a political exercise. If she's not willing to discuss it, then take it down. Your class is not a totalitarian state.