Just to clarify - no student may have any documents other than ONE document open when taking class notes. You may not have emails, yearbook, power school, web sites, or other windows open during class time. If you cannot remember to close your windows prior to coming to class, please feel free to take handwritten notes during class.
As of today, you are responsible for any infractions to this rule - you have been warned many times. Some students prefer to use the Chromebook rather than take hand-written notes. Computers can be a wonderful learning tool in the classroom.
However, it is your responsibility to follow the rules.