Learning Index depends on two factors that are difficulty level and cognitive level and the algorithm is designed to calculate the score based on the responses of the students. For example, if a student answers a difficult application based question correctly, his learning index will increase but if he answers an easy knowledge-based question incorrectly, his learning index will decrease.
On your dashboard, you can see the recently attempted topics, and if you haven’t finished the topics then you can directly continue from your dashboard. You can even see the graphical comparison of attempted topics.