import 'package:flutter/material.dart'; class Grade extends StatelessWidget { final String _grade; @override Widget build(BuildContext context) { return Container( padding: EdgeInsets.all(10.0), child: Text( _grade, style: TextStyle( color: Colors.white, fontSize: 20.0, ), ), decoration: BoxDecoration( color: Colors.blue, shape: BoxShape.circle, ), ); } Grade(this._grade); }