"Class attendance" refers to the act of being present and participating in a class or school activity. It means attending a scheduled lesson or gathering where learning takes place. Full definition
The 18 month period is calculated from the citation / violation date, not class attendance date. (onlinetraffic.com)
Would you like to take class attendance with just a click on your phone? (elearningindustry.com)
Although the appointments happen during the school day, they often improve class attendance while reducing other disruptions, like anxiety attacks. (lsswis.org)