Not only can it be a disruption to the dance class, entering the room late can be very intimidating to your kids. Getting there early will help prepare your dancer and give you enough time to get comfortable or situated with the new environment. It is a great idea to be a few minutes early so your dancer can see the room and hopefully have time to talk with the teacher before dance class. When the dancers enter the room all together, it makes it feel more like a group experience.