A generic e-homework system, PDFeH, was proposed and prototyped to replace traditional paper homework electronically. With pre-created PDF form documents as templates, teachers and students can complete main e-homework phases using free Adobe Reader. That is, composing questions, entering answers, commenting and markup and grading, and viewing finally archived documents. Digital signatures are used to secure contents. Supporting files can be converted and packaged with their host PDF document with moderate additional effort. The interactive process was implemented with server/client network software for users to work online and offline.