Personalized Physician Learning (PPL) interventions are powerful enough to change physician behavior and improve HT care. The PPL interventions in this project are directed to individual primary care physicians(PCPs) using a simple 3-step approach: (a) Analyze each physician's pre-intervention patterns of HT care to identify specific failures of physician decision making in HT care, (b) Provide each physician with a series of personalized HT learning cases designed to correct the failures of decision making that result in that physician's observed patterns of HT care. Learning cases provide iterative on-screen feedback of blood pressure (BP) changes in response to a sequence of changes in therapy, expert-generated suggestions for better HT care, and adaptive selection of subsequent cases until identified errors in decision making are mastered. (c) Assess intervention impact on the care of actual patients with HT in the post-intervention period, to assess transfer of learning from the simulated to the office practice environment. The PPL intervention strategy is based on recent work in cognitive science and learning theory and has been successfully applied in other research and educational settings, although it has yet to be applied to HT care.