This study aims to determine how much influence teacher competence, motivation, and work environment have on teacher performance at SMP Kartika 1-2 Medan. The results showed that simultaneously teacher competence, motivation and work environment had a significant effect on teacher performance at SMP Kartika 1-2 Medan. Partially teacher competence, motivation and work environment have a significant effect on teacher performance at SMP Kartika 1-2 Medan and partially teacher competence, work motivation and work environment have a significant effect on teacher performance at SMP Kartika 1-2 Medan.
                        
                        
                        
                        
                            
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