1. A method for tracking teeth movement correction, the method comprising: using a set of positioning appliances shaped to move teeth through a number of successive stages of arrangements of an expected teeth arrangement model where each stage corresponds to a particular positioning appliance; mapping a current teeth position based upon positions of a number of physical markers attached to a number of physical teeth; comparing the positions of the number of physical markers with a corresponding number of virtual markers positioned on a number of virtual teeth of a stage in the expected teeth arrangement model; and determining whether midcourse correction is needed.