Illustration from "The little folks of animal land". Inscription below image: "Rosie was a patient model." (1915) animal art… https://www.rawpixel.com/image/11493528/photo-image-dog-cat-artFree Image from public domain licenseAstronomy for the use of schools and academies (1882) chromolithograph art by Joseph Anthony. Original public domain image… https://www.rawpixel.com/image/10184947/image-paper-space-patternFree Image from public domain licenseBlackboard png sticker school supply illustration, transparent background. Free public domain CC0 image. https://www.rawpixel.com/image/6338484/png-sticker-public-domainFree PNG from public domain licenseChalkboard png sticker, stationery illustration, transparent background. Free public domain CC0 image. https://www.rawpixel.com/image/6430838/png-frame-stickerFree PNG from public domain licenseBlackboard png sticker, stationery illustration, transparent background. Free public domain CC0 image. https://www.rawpixel.com/image/6449366/png-frame-stickerFree PNG from public domain licenseScience in the Cinema: An NIH Film Festival. Original public domain image from Flickr https://www.rawpixel.com/image/9646900/image-people-arts-medicineFree Image from public domain licenseChalkboard png sticker stationery illustration, transparent background. Free public domain CC0 image. https://www.rawpixel.com/image/6338236/png-frame-stickerFree PNG from public domain licenseA Lohan (disciple of Buddha), seated on a rock holding a staff. Woodcut in the manner of an ink stone rubbing, China, 18--. https://www.rawpixel.com/image/13967768/image-cartoon-face-personFree Image from public domain licenseScience png chalkboard and scientist sticker education illustration, transparent background. Free public domain CC0 image. https://www.rawpixel.com/image/6755537/png-frame-stickerFree PNG from public domain licenseOpus 862, Christus uit den dood herrezen wandelt droevig in den holen van 't bewustzijn (1916 - 1927) by Albert Plasschaert https://www.rawpixel.com/image/13743972/image-background-texture-artFree Image from public domain license Black Lives Matter Art and signs during the 2020 Juneteenth Celebration on Black Lives Matter Plaza… https://www.rawpixel.com/image/8072241/photo-image-art-celebration-public-domainFree Image from public domain licenseBlackboard png sticker, transparent background. Free public domain CC0 image. https://www.rawpixel.com/image/8925737/png-white-background-frameFree PNG from public domain licenseChalkboard and scientist clipart, education illustration vector. 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Sourced from the Library of Congress. https://www.rawpixel.com/image/12240498/photo-image-person-public-domain-childFree Image from public domain licenseProfessor png illustration, transparent background. Free public domain CC0 image. https://www.rawpixel.com/image/7661982/png-white-background-faceFree PNG from public domain licenseClose up of a question mark drawn with chalk on a chalkboard.Free public domain CC0 image. https://www.rawpixel.com/image/5917647/image-public-domain-free-question-markFree Image from public domain licenseChalkboard clipart, school supply illustration vector. Free public domain CC0 image. https://www.rawpixel.com/image/6331614/vector-sticker-public-domain-noteFree Vector from public domain licenseBandontwerp voor: Oom Ben, Pim's Poppetjes: een kijksprookje voor zijn vriendinnetjes en vriendjes, 1913 (in or before 1913)… https://www.rawpixel.com/image/13739747/image-paper-face-flowersFree Image from public domain licenseBlackboard clipart, stationery illustration vector. Free public domain CC0 image. https://www.rawpixel.com/image/6449471/vector-frame-sticker-public-domainFree Vector from public domain licenseBlackboard collage element, school supply illustration vector. Free public domain CC0 image. https://www.rawpixel.com/image/6331551/vector-frame-sticker-public-domainFree Vector from public domain licenseChalkboard clipart, school equipment illustration. Free public domain CC0 image. https://www.rawpixel.com/image/6430780/image-frame-public-domain-illustrationsFree Image from public domain licenseElsje kijkend naar een schoolbord (in or before 1926) by Anny Leusink https://www.rawpixel.com/image/13737564/elsje-kijkend-naar-een-schoolbord-in-before-1926-anny-leusinkFree Image from public domain licensePage from a Scrapbook containing Drawings and Several Prints of Architecture, Interiors, Furniture and Other Objects https://www.rawpixel.com/image/10234994/image-background-paper-bookFree Image from public domain licenseEmployment office on Howard Street. San Francisco, California. Sourced from the Library of Congress. https://www.rawpixel.com/image/12243185/photo-image-public-domain-office-architectureFree Image from public domain licenseChalkboard sticker, school equipment illustration vector. Free public domain CC0 image. https://www.rawpixel.com/image/6431353/vector-frame-sticker-public-domainFree Vector from public domain licenseReligious sign, Minneapolis, Minnesota. Sourced from the Library of Congress. https://www.rawpixel.com/image/12301905/image-background-public-domain-numberFree Image from public domain license[Untitled photo, possibly related to: Warner Robins, Georgia. Air Service Command. Instructor taking part in discussions of… https://www.rawpixel.com/image/12307810/image-person-art-public-domainFree Image from public domain licenseKonijn (Oryctolagus cuniculus) (1790 - 1814) by anonymous and David de Coninck https://www.rawpixel.com/image/13795304/konijn-oryctolagus-cuniculus-1790-1814-anonymous-and-david-coninckFree Image from public domain licenseA thought bubble created with chalk and a light bulb on the framed blackboard https://www.rawpixel.com/image/5971289/photo-image-bubble-meditation-lampFree Image from public domain licenseOntwerp voor de achterkant en rug van een boekband (1874 - 1945) by Carel Adolph Lion Cachet https://www.rawpixel.com/image/13794351/image-paper-frame-artFree Image from public domain licenseChalkboard and scientist, education illustration. Free public domain CC0 image. https://www.rawpixel.com/image/6755032/image-frame-public-domain-greenFree Image from public domain license