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Code Explained - The Home Screen :

import 'package:flutter/material.dart';
import './landing_page.dart';
import 'package:flutter/material.dart';
import './quiz_page.dart';
import './missedquestions_page.dart';
import './list.dart';
import './testslist.dart';
import './termslist.dart';
import './about.dart';
class Page extends StatelessWidget {


  Page();

  @override
  Widget build(BuildContext context) {
    return new Material(
        color: Colors.pinkAccent,
        child: new Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            new Text("Review Terms", style: new TextStyle(color: Colors.white, fontWeight: FontWeight.bold, fontSize: 25.0),),
            new IconButton(
                icon: new Icon(Icons.local_library),
                color: Colors.white,
                iconSize: 40.0,
                //onPressed: () => Navigator.of(context).pushAndRemoveUntil(new MaterialPageRoute(builder: (BuildContext context) => new LandingPage()), (Route route) => route == null)
                onPressed: () => Navigator.of(context).pushAndRemoveUntil(new MaterialPageRoute(builder: (BuildContext context) => new TermsList()), (Route route) => route == null)
            ),
            new Text("\nTest Your Knowledge", style: new TextStyle(color: Colors.white, fontWeight: FontWeight.bold, fontSize: 25.0),),
            new IconButton(
                icon: new Icon(Icons.grade),
                color: Colors.white,
                iconSize: 40.0,
                //onPressed: () => Navigator.of(context).pushAndRemoveUntil(new MaterialPageRoute(builder: (BuildContext context) => new LandingPage()), (Route route) => route == null)
                onPressed: () => Navigator.of(context).pushAndRemoveUntil(new MaterialPageRoute(builder: (BuildContext context) => new TestsList()), (Route route) => route == null)
            ),
            new Text("\nAbout", style: new TextStyle(color: Colors.white, fontWeight: FontWeight.bold, fontSize: 25.0),),
            new IconButton(
                icon: new Icon(Icons.help_outline),
                color: Colors.white,
                iconSize: 40.0,
                //onPressed: () => Navigator.of(context).pushAndRemoveUntil(new MaterialPageRoute(builder: (BuildContext context) => new LandingPage()), (Route route) => route == null)
                onPressed: () => Navigator.of(context).pushAndRemoveUntil(new MaterialPageRoute(builder: (BuildContext context) => new About()), (Route route) => route == null)
            ),

          ],
        )
    );
  }
}

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