Iron Tower The Homepage for Object-Orientated Training. Concentrates on design by contract and the Eiffel language. http://eiffel.co.uk/

A Formative Evaluation of Scenario-Based Tools for Learning Object-Oriented Design Examines how a set of object-oriented design learning tools developed by Rosson and Carroll facilitate active learning. Published in ACM Crossroads. http://www.acm.org/crossroads/xrds5-1/eval.html

Object Discovery Corporation provides public courses and on-site training in C++, CORBA, Java, Enterprise JavaBeans, OOAD, UML and Object Oriented Business Process Reengineering. http://www.objectdiscovery.com/

Introduction To Object-Oriented Programming Introductory level tutorials on basic OOP concepts such as encapsulation, inheritance, and polymorphism. http://bepp.8m.com/English/OOP/index.htm

Object Mentor Inc. Provides training to object oriented developers looking to accelerate development with methodologies such as XP and advanced software design principles. Site provides articles, download, and courses information. http://www.objectmentor.com/

Dr Ledgard's OOP Site Contains an introduction to object oriented programming concepts based with examples in C++. Also includes a glossary, interactive quizzes and references. http://www.eecs.utoledo.edu/~ledgard/oop/mainpage.html

Building Object Applications that Work Step-By-Step Handbook for Developing Robust Systems Using Object Technology. Written in everyday language and covers topics that are pertinent to real-world developers. This book is written from a developer perspective. By Scott W. Ambler, SIGS Books. http://www.ambysoft.com/buildingObjectApplications.html