You can author your own DartPad workshops!
If you are interested, check out the following resources:

DartPad Workshop Authoring Guide

DartPad Sharing Guide (using a Gist file)

Embedding DartPad in your web page

Articles

We’ve published the following articles on the Flutter Medium
publication since the last stable release:

How It’s Made: I/O Photo Booth

Which factors affected users’ decisions to adopt Flutter? - Q1 2021 user survey results

March 3, 2021, Flutter Engage Edition: 2.0 release

Flutter 2 is live!!!  For more information, see
Announcing Flutter 2, What’s new in Flutter 2,
Flutter web support hits the stable milestone,
Announcing Dart 2.12,
and the Flutter 2 release notes.