Will All My Information Go Onto My Memory Stick?

I just fiished my histiory essay, but my printer is broken. I told my teacher and he gave me a memory stick to put the essay on so he could print it at my school. I was on Microsoft word and went under save as and selected the memory stick and I saved it onto his stick no problem. Then I exited microsoft word and put the memor stick back in. Under documents it showed the essay, but then if I went under pictures it also showed all my pictures and other documents and stuff saved onto my computer. Will my teacher be able to access all this stuff on his computer too? Will he be able to see all my other documents and pictures? Please Help ASAP, I need to give his stick back tommorow.