standing chalkboard

advertising aged ancient announcement antique background billboard black blackboard blank board border bulletin business chalk chalkboard chalktray children class classroom clean college copy cut cutout dirty draw drawing education educator elementary empty erase eraser frame green grunge historical horizontal isolated kid learn lesson letter marks message messy nobody note object obsolete old pattern presentation pupil retro school schoolchild scratchy scribble slate small smudge space student study teach teacher text texture university vintage white wood wooden word work worn write writing