Displaying course data with 90+ values

Description:

Hello, web developer here! I have been tasked to show scores for a online course that people have purchased. So I built a line graph that went up and down based on the score (naturally). The demo data had 30-40 lessons so the single graph was decent. Recently they added many more modules (40-50) with a total of 90+ lessons. There is a possibility of even more lessons added in the future.

Each lesson has a score, number of attempts it took and date completed. I want to be able to have the user hover/click over the score and view the attempts and date.

Also, I want to have the user to be able view data corresponding to EACH lesson, so a line graph that has increments of 10 would NOT work.

Question:

How can I best show a user score, attempts and date completed for 90+ lessons?

My research thus far:

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