SolidWorks Corp. is providing an online Engineering Design Challenge it says helps you gain insight and top tips for improving your products and your career. The test includes several sections, for instance, "Optimization." Select an answer and the program shows whether or not you were correct and includes a brief paragraph explaining why, in real time. Instructive videos in each section explain topics in further depth. DS SolidWorks Corp., 300 Baker Ave., Concord, Mass. 01742, (800) 693-9000.