Abstract: Anti-vandalism sheets for the interior of public transportation vehicle windows are provided and comprise flexible yet sturdy protective sheets of acrylic and selected brackets for securing the sheet to the interior of a motor vehicle window. A plurality of fixed brackets are positioned about three of the four edges of the window, having one portion connected to a window frame housing the motor vehicle window and a second portion sufficiently distanced from the surface of the window to accommodate the thickness of the sheet for securing the sheet adjacent the windows. A selectively removable retaining bracket is positioned on the edge of the window unoccupied by the fixed brackets.