Ice,
If the computers at school have access already installed, then you do not need to (and can't do it anyway) convert the file to .exe.
The .mdb or .mde will simply be able to be copied to the machine in question.
If you have split your front and back ends, then you may need to use the linked table manager to reconnect the two.
If you have linked images (not embedded), then you should copy these to the same directory also.
You could zip all the components (mdb be and fe and images etc) into a zip (or .exe) and then the extraction (copying) part is easier.
However, conversion of an .mdb to .exe is NOT possible as previously stated. I would suggest that you seek clarification from your teacher as to what exactly they want. If your teacher restates that they want it "converted" to an .exe, then you just tell them that "the access gods" (Pat) said it can't be done.
Happy studying.
Brad.