Our school district allows for 10 days of excused absences. Go and have a great time. Three days is not going to make one bit of difference to a 4th grader. My son is going into 5th, I just told his teacher we were taking two days at the end of September around the Jewish holiday. She couldn't have been nicer about it. My parents took me out just about every year in January for a trip to Florida. I was an honor student and suffered no ill effects! What do I remember most about growing up, those trips and the days she used to say "Let's skip and go into Manhattan". You are only young once, have fun!