This document provides a literature review of face recognition-based attendance systems. It summarizes several past studies that developed systems to automatically detect students' faces in images and use face recognition algorithms to mark attendance. The review finds that while many algorithms have been implemented, including Haar Cascade, Viola Jones, Eigenface, PCA, LDA, and LBPH, accurately verifying each student in a classroom remains challenging. The document analyzes the performance of previous systems and the issues that still exist, in order to provide suggestions for improving future work on automatic attendance tracking using face recognition.