The content is somewhere not effective when it doesn't answer a few questions such as: How much time should a student spend on a chapter? Are they familiar enough with the concept now? How much time should be spent in reading from the textbook?
Are the notes from tuition/coaching enough? How much time should be allocated to a certain topic? Should they watch another video lecture regarding the topic? Such question should not arise in the minds of the students while they're referring to the content on your platform.