Stock Photo: Teacher teacher classroom school classroom education thinking trouble troubling lost male study school cram school

teacher　 classroom　 blackboard　 distress　 trouble　 fatigue　 tiredness　 teachers　 school　 lesson　 class work　 educate　 schooling　 male　 man　 seriou　 person　 studying　 learn　 learning　 study　 podium　 teacher's desk　 coaching school　 high school　 junior high school　 middle school　 elementary school　 senior high school　 suffer　 have trouble　 be perplexed　 have difficulty　 be in trouble　 be in difficulties　 have a hard time　 be troubled　 be distressed　 be put out　 be inconvenienced　 be worried　 be bothered　 be stumped　 teach　 take charge of　 be in charge of　 youthful　 business　 exhaustion　 worried　 worry　 stray　 get lost　 be puzzled　 vacillate　 be at a loss　 lose one's way　 be lost　 be in doubt　 be not certain　 be in two minds　 turn in a grave　 stress　 contemplation　 overwork　 overworking　 Japanese people　 japanese　 asian　 indoor　 twenty　 one person　 suit　 suits　 full body　 facade　 hang down one's head　 look downward　 arms folded　 desk　 chair　 chairs