The research aimed to 1) build and assess suitability of the learning management plan of the predictive-observation-explanatory (POE) technology based learning approach to promote scientific explanation making about the change of the substance for primary school students, 2) to distill the lesson learnt of the predictive-observation-explanatory (POE) technology based learning approach to promote scientific explanation making about the change of the substance for primary school students. The research was action research. The sample in the research consisted of: (1) a group of experts assessing the learning management approach, namely staff of teachers, teachers of science and experts of science learning management, accounting for 9 people and (2) the experimental group of learning management, namely 3 science teacher and 40 Year 5 primary school students. Purposive sampling was used to come up with a total of 52 people. The study results revealed that: 1) Building and assessing suitability of the learning management plan of the predictive-observation-explanatory (POE) technology based learning approach to promote scientific explanation making about the change of the substance for primary school students has brought about the learning management plan for 3 learning management plans by using the total of 3 hours for learning. There is the process in organizing learning activities for 7 steps called "7P POE Technology based Learning Model" consisting of (1) Positive Stimulate, (2) Pre-debate, (3) Predict, (4) Post-debate, (5) Participant Observation, (6) Phenomenon Explanation and (7) Practice and the result of suitability assessment was at the highest level. 2) Distilling the lesson learned of the predictive-observation-explanatory (POE) technology based learning approach to promote scientific explanation making about the change of the substance for primary school students has found that scientific learning competency called (Scientific Explanations Making Concepts consists of (1) Positive Definition, (2) Scientific Phenomenon Prediction and (3) Logical Thinking. This is important scientific learning competency which should be developed to primary school students in the future.