![Premium Photo | Mature bald professor in smart casualwear holding piece of chalk while standing by blackboard in classroom or lecture hall and looking at you Premium Photo | Mature bald professor in smart casualwear holding piece of chalk while standing by blackboard in classroom or lecture hall and looking at you](https://img.freepik.com/premium-photo/mature-bald-professor-smart-casualwear-holding-piece-chalk-while-standing-by-blackboard-classroom-lecture-hall-looking-you_274679-18824.jpg)
Premium Photo | Mature bald professor in smart casualwear holding piece of chalk while standing by blackboard in classroom or lecture hall and looking at you
![Mathematicians' chalk experiments captured as art in new book from photographer Jessica Wynne | University of Chicago News Mathematicians' chalk experiments captured as art in new book from photographer Jessica Wynne | University of Chicago News](https://news.uchicago.edu/sites/default/files/images/2021-12/benson-farb.jpg)
Mathematicians' chalk experiments captured as art in new book from photographer Jessica Wynne | University of Chicago News
![Confident young math professor standing in front of the chalkboard and explaining formulas, he is pointing and smiling Stock Photo - Alamy Confident young math professor standing in front of the chalkboard and explaining formulas, he is pointing and smiling Stock Photo - Alamy](https://c8.alamy.com/comp/2CTNAF6/confident-young-math-professor-standing-in-front-of-the-chalkboard-and-explaining-formulas-he-is-pointing-and-smiling-2CTNAF6.jpg)
Confident young math professor standing in front of the chalkboard and explaining formulas, he is pointing and smiling Stock Photo - Alamy
![Confident Math Professor Teaching in Front of the Chalkboard Stock Photo - Image of explaining, intelligent: 197220690 Confident Math Professor Teaching in Front of the Chalkboard Stock Photo - Image of explaining, intelligent: 197220690](https://thumbs.dreamstime.com/b/confident-math-professor-teaching-front-chalkboard-confident-young-math-professor-standing-front-chalkboard-197220690.jpg)
Confident Math Professor Teaching in Front of the Chalkboard Stock Photo - Image of explaining, intelligent: 197220690
![Professor Writing Mathematical Formula Equation Blackboard School Classroom College University Stock Photo by ©terovesalainen 208105534 Professor Writing Mathematical Formula Equation Blackboard School Classroom College University Stock Photo by ©terovesalainen 208105534](https://st4.depositphotos.com/13754004/20810/i/1600/depositphotos_208105534-stock-photo-professor-writing-mathematical-formula-equation.jpg)
Professor Writing Mathematical Formula Equation Blackboard School Classroom College University Stock Photo by ©terovesalainen 208105534
![Professor, teacher, blackboard, mathematic formulas, equations, mathematic lessons, maths Stock Photo - Alamy Professor, teacher, blackboard, mathematic formulas, equations, mathematic lessons, maths Stock Photo - Alamy](https://c8.alamy.com/comp/CXY3FF/professor-teacher-blackboard-mathematic-formulas-equations-mathematic-CXY3FF.jpg)
Professor, teacher, blackboard, mathematic formulas, equations, mathematic lessons, maths Stock Photo - Alamy
![Why the world's top mathematicians prefer blackboards and chalk | Glen Innes Examiner | Glen Innes, NSW Why the world's top mathematicians prefer blackboards and chalk | Glen Innes Examiner | Glen Innes, NSW](https://www.gleninnesexaminer.com.au/images/transform/v1/crop/frm/steve.evans/628fa322-7d56-41d8-be67-f9ea2f735df2.jpg/r587_678_4414_3489_w5000_h3673_fmax.jpg)