Little girl writing on blackboard

concept education young blackboard cute chalk learn study writing background class student work boy kid write caucasian drawing hand knowledge algebra addition person science mass green logic diagram dna skull atomic bayes operator planets fingerprints triangle theorem alphabet evolution leartn iq cognitive maths business difficulty text teacher portrait high exam looking beautiful pretty e research mc mc2 china educational relativity equation theory pattern clever schoolchildren youngster grade calculate solve primary doing schoolkid beginner sat help palm human vector life safe finger medicine family illustration nurse healthy care design limb home five mother health ideas impossible idea success goal horizontal opportunity challenge plan motivate possible think hair conceptual 5 backpack schoolbag schoolkids homework child school girl little classroom board mathematics math smart elementary genius happy childhood black chalkboard solution lesson female handwriting symbol number sum people schoolgirl energy formula college feynman sucrose australopithecus atom rocket bayesian newton saturn galileo pythagoras pi learning know toddler development cognition algebraic back hard man smiling standing woman beauty cheerful indoors book physics university albert speed mathematical light figure japan calculation youth one confident pupil crayon african-american lifestyle holding arithmetic answer serious gre love isolated secure sign adult friendship insurance label protection icon nursing hope safety abandoned agreement greenboard contrast silhouette comfort vision optimist positive difficult white philosophy achievement possibility courage delete ponytail motivation attitude try yearold ball kids teaching