This report, in two volumes, describes the operational demonstration and assessment of an innovative toolkit resulting from a research program aimed at enhancing self-development of junior leaders in the Army. The toolkit contains online diagnostic and training tools that build self-awareness, metacognitive abilities, critical thinking skills, and interpersonal skills. Soldiers in units and user juries provided feedback on the tools. The pressures of the operational environment seriously limited the time available to work with the tools. The user satisfaction results indicated the toolkit provides a reasonable mix of capabilities, but completeness remains an open question. The tools appear to be especially suitable for use in pre-commissioning and military education programs. They offer moderately favorable acceptability, learning effectiveness, and value. However, the online learning methods may need modification to accommodate the importance Army leaders place on interpersonal interaction with mentors and peers. The findings, lessons learned, and recommendations can help decision makers, program architects, training developers, and research investigators advance the state of the art for leadership development programs. Volume II, ARI Research Note 2009-09, presents the report's appendices.