I am finishg my junior year of high school and have a chemistry teacher who has been a HUGE help. He helped me get funded $1500 for a project I am doing, taught me a lot, and devotes a lot of time that he could be using for himself, rather than on me. He has helped me get a summer internship at RPI, and he has written me many letters of recomendation. So of course.. it is tough coming up with a gift which can even remotely explain my gratitude. Although I am constantly expessing my appreciation verbally and helping him out as well... I feel as though any gift will be an understatement to his efforts. He says that my acomplishments make it all worth it.. but I really want to give him something meaningful. A few weeks ago his wife gave birth to their first son, and of course he was/is very excited. His (the teacher) last name is Schmidt, and he named his son Harrison... well he let me know that there just so happens to be an astronaut named Harrison Schmitt, and he has been browsing ebay for pictures of him on the moon.. Well, thinking to myself, I thought it would be nice to get him a photo for his son.. I then thought, the astronaut is probably still alive! So after a little searching on google, I found his phone number and contact information. I called him up, explained the situation, and told him that it would mean a lot if I could get him to sign the photo I bought. Of course, the astronaut just so happens to tell me that he has stopped signing autographs because after 30 years it got to be too much, but he told me to try and send the photo and he will see what he can do.. So that was last week and I am still waiting for a reply, but if I get that back, I think it would make an excelent gift. So maybe try and see if your teacher has any heros or favorite phsysics or anything. I know that there is a lot of memorabilia out there on feynman and he had a huge impact on just about every physicist since his time, so maybe some video lectures or book or something? Either way, let me know what you end up deciding on, I like this post :)