An empirical - conceptual reflexive research from within was accomplished aiming at investigating how and why organizational change and learning occurs through teacher`s collective learning and change at two 50 and 20 years old Management and Marketing Business Schools It was designed as a qualitative instrumental case study where complete participant observation, semi-structured interviews and documental research were developed. For this reason the researcher joined to the teacher`s staff at both business schools for a three years period in order to gain deep understanding about teacher`s work daily practices focusing its change and learning dynamics. Field data were interpretatively processed within four- level analysis according to Alvesson & Sköldberg`s reflexive methodology. Therefore metatheoretical analysis and multiparadigmatic triangulation of the developed knowledge on collective learning and change processes was included. In this way micro processes under study could be comprehensively understood in its dynamics complexity and configured as emotionality and power dimensions coexisting inextricably connected to rationality in a coevolving permanent tension. Micro processes` knowledge implications are related to organizational and group change and learning nature. Three results were accomplished: academic ones, practical ones for business schools management and for researcher`s own knowledge.