Technology is assumed to help students learn to read and write. However, with the array of differing devices and inconsistent, non-standardized digital materials across the school setting, technology can create utter confusion rather than deepen the understanding of reading and writing skills. We expect that when a student creates a document -- and a teacher, peer or parent reviews or edits the document -- content with all the feedback and marking will appear consistently from teacher to student, no matter what device each one uses. But nothing could be further from the truth. The integrity of documents -- or content fidelity -- is one of the most significant, yet seldom talked about, challenges for educators to manage. Here's how to manage it.