Currently available web page accessibility guidelines focus more on reading and writing, with inadequate attention to other aspects of online learning such as computer-mediated communication. This study aims to explore the engagement of Malaysia secondary school students with dyslexia and students without dyslexia on various synchronous and asynchronous communication interaction technologies in an online collaborative learning environment. Multiple case within subject qualitative study was employed to investigate the engagement of students using a semi structured interview guideline. The findings revealed that (1) text chat is unsuitable for learning discussion for all learners, (2) forum affords self-paced and organized formal discussion for most learners and (3) video conferencing is suitable for interactive face-to-face, verbal discussion for most learners.