anchor.diff:              {skip_empty_submissions}
             </div>
             <div className='columns'>
  -            <GroupsGraderTable ref="groupsTable"
  +            <ReviewerTable ref="groupsTable"
                 groups={this.state.reviewer_groups}
                 selected_groups={this.state.selected_groups}
                 onSelectedGroupsChange={this.updateSelectedGroups}
                 selected_students_in_groups={this.state.selected_students_in_groups}
                 onSelectedStudentsInGroupsChange={this.updateSelectedStudentsInGroups}
                 refresh={this.refresh} />
  -            <GroupsActionsColumn refresh={this.refresh}
  +            <CenterActionsColumn refresh={this.refresh}
                 performAction={this.performAction} />
  -            <GroupsGradingTable ref="groupsTable"
  +            <RevieweeTable ref="groupsTable"
                 groups={this.state.reviewee_groups}
                 selected_groups={this.state.selected_groups}
                 onSelectedGroupsChange={this.updateSelectedGroups}
  
positive.code:   });
  
    // The table of groups on the right.
    var GroupsGradingTable = React.createClass({
      getDefaultProps: function() {
        return {
          columns: [
  
negative.code:     }
    });
  
    var CenterActionsColumn = React.createClass({
      performAction: function(event) {
        var action = event.currentTarget.getAttribute('id');
        this.props.performAction(action);
  