This five-day, intense, hands-on workshop helps prepare experienced application developers with all the required knowledge to pass the Adobe Certified Expert exam for Flex 4.x. Late in 2011, Adobe donated the Adobe Flex SDK to the Apache Foundation. It is currently under incubation as Apache Flex. Now, the SDK is truly open source with development driven by community members in a meritocracy. The official Adobe Flex courseware is used in this course because the language has not changed significantly. The workshop covers all the material students need to develop rich Internet applications (RIA) for the Adobe Flash platform using the Adobe [Apache] Flex 4.x framework, and thoroughly explores messaging, remoting, web services, performance profiling, unit testing, and client-side data manipulation.