This document discusses different types of learning technologies used in education, including their advantages and disadvantages. It describes computer-aided instruction (CAI) which tends to replace the teacher, and computer-aided learning (CAL) which is a learning tool used to support existing teaching methods. CAI focuses on delivering subject knowledge through repetition and testing, while CAL allows for a more integrated approach led by the teacher. The document asks the reader to compare the advantages and disadvantages of CAI and CAL, and decide which they prefer. It also outlines other technologies like computer-mediated communication and computer-aided assessment.