Switching exercise days

hey everyone,

 I exercise  mon, wed,fri those are the days that i'm at school the longest and i walk long distance to my classes and im carrying heavy books , then after all that when i get home i do wii fit with my  mom for 30 mins. However, on tuesdays and thursdays I only have one class and i'm maybe up their for three hours and i come home earlier and do nothing. I am currently at my goal weight however i think i should change my exercise days  because i am just burning fat and i want to learn how to maintain my weight, so do you guys think  i should change my exercise day s to tue and thursday, and I would love any tips on maintain your weight after weight lost

thanks,