This training session, scheduled just ahead of the ATLAS ROD workshop, will introduce developers to a set of modular building blocks that can be used in the design of DAQ systems: the RCE (Reconfigurable Cluster Element), CIM (Cluster Interconnect Module), and ATCA packaging standard. Systems assembled from these blocks provide adaptable, high-performance I/O on an industry-standard backplane. The training includes substantial hands-on experience with RCE and CIM hardware. Dinner at the Hotel Bois Joly (website, additional map) will be 30 Euro per person. On day two, morning plenary sessions will provide a "hello world" introduction to the complete RCE development cycle, followed by a detailed case study of a prospective interface between ATLAS front-end electronics and the RCE. Break-out sessions then provide an opportunity for hands-on hardware experimentation or Q&A discussion with experienced RCE developers. Day two ends with an open discussion of how an "ATLAS RCE working group" should be structured, and how the future direction for ATLAS RCE development should be set. Note: The agenda for the training is tentative. We encourage you to contact us to provide agenda feedback and shape this course to match your needs and interests.