‘UDL - Using Perusall to Create a Collaborative Learning Experience’ Students often struggle to engage deeply with readings and lack confidence to share their thoughts in class sessions. By using a collaborative online annotation tool called Perusall for required readings, students earn credit for completing the reading assignments and learn to read more actively. Dr Celeste McNamara, Assistant Professor at the DCU School of History and Geography, uses Perusall in all modules, including Renaissa