What should you do if your child will use the potty at home but, refuses to use the potty at school or day care? First of all, you need to figure out if there is a fear of potty at school. Does he not like the potty because it makes too much noise? Does she not like to sit on the regular toilet because it's too big? Figure out what the fear is and then resolve that problem. Once they've overcome the fear, then you can expect your child to sit on the potty. In order to get your child to sit on the potty at school, you want to give her a reason to sit on the potty. You want to motivate her to want to sit on the potty. You can do that by using rewards. You can tell your child, "Remember, if you sit on the potty at school, you can have bubbles as reward." Or, "Remember, if you go pee on the potty at school, then you can have a cookie."
You can also encourage your child to keep her pants dry while she's at school and encourage her to use the potty and then when she gets home from school or day care then she can have a special treat that she only gets at home. So, either way, you want to motivate your child to use the potty at home, at school, at day care or even at other public places. Once they're comfortable using the potty at home and at school, then you can expect them to use the potty at a friend's house or at the movie theater.