It appears students are adding lines of code without coding?

Hey all, We are doing a school wide competition and we assigned the Express Course. However when I look at some students accounts, the numbers don’t add up. One student has done 20,000 lines of code in a few hours…can they hack it or play the system?
Even simpler, can I set the class so that only the lines from Express are in the stats?

Good Morning, do you know how I can view how many lines of code a student has typed? I went to the stats but the count says 0 for all of my students.