black chalkboard on white background. chalk rubbed out on blackboard. the wood framed blackboard

empty writing activity lecture hall inspiration classroom chalkboard page pencil drawing pattern reminder paint blank white weathered message teaching studio shot back school art design black stained simplicity bulletin board wall visual aid scratched chalk equipment closeup frame retro style still life mathematics menu paper indoors learning ideas education backgrounds dirty copy space border wood material childhood rectangle dark cut handwriting banner isolated background rubbed blackboard framed background blackboard