Prepositions(from/to)
  
    <----------------Class----------------------->

    9:00         10:15  -  10:25             11:30

                 <----Break---->

    Class is at 9:00.           Class is over at 11:30.
    Class is begins at 9:00.       Class ends at 11:30.
    Class is from 9:00.........to................11:30.

    Our break is from 10:15 to 10:25.
    _________________________________________________________


    Class is_________9:00.     Class is_______at 11:30.
    Class begins_____9:00.     Class ends_________11:30.
    Class is_________9:00_________11:30.


    Our break is________10:15.    Our break is______at 10:25.
    Our break begins____10:15.    Our break_________at 10:25.
    Our break is________10:15_______10:25.

    _________________________________________________________