Sentence 1: Joe wanted to be better at math. 
 Sentence 3: But he didn't think he was improving quickly enough 
 Sentence 4:  So he lost all motivation to practice 
 Sentence 5:  Later, Joe realized if he were more patient he would have improved 
 Option 1: So he bought math textbooks and began to practice. 
 Option 2: So he get a math tutor and studied with the tutor and got much better grades.