Sharing is not just caring, it's also about giving credit - add this image to your page and give credit to the talented photographer who captured it.:
algebra arithmetic black blackboard blackboards board boards calculate calculating chalk chalkboard chalkboards chalks child childhood children class classroom close closeup concept concepts contemporary copy crayon crayons educating education educational elementary empty exam examination green hand hands hold holding indoor inside knowledge learn learning lecture lesson math mathematics number numbers object pen pencil pencils pens school solve solving space stationery sum supplies test testing thing utensil white write writing