accidentally took this out

src/views/teacherregistration/teacherregistration.jsx

@@ -79,6 +79,8 @@ var TeacherRegistration = React.createClass({
                     <Steps.RegistrationError {... this.state} />
                 :
                     <Progression {... this.state}>
+                        <Steps.UsernameStep     onNextStep={this.advanceStep}
+                                                waiting={this.state.waiting} />
                         <Steps.DemographicsStep onNextStep={this.advanceStep}
                                                 waiting={this.state.waiting} />
                         <Steps.NameStep         onNextStep={this.advanceStep}