The study investigated "Meta-cognition as a determinant of productive learning among out-of-school emerging adults engaged in mechanic work in Buea Municipality". The specific objective is; To ascertain the extent to which executive functioning impacts productive learning among out-of-school emerging adults engaged in mechanic work in Buea municipality. Methodologically, the research design used was experimental design and the type of design quasiexperimental research design and exploratory research design with the aid of a pretest and posttest. The population of the study was made up of all apprentices between the ages 15 to 25 in mechanic garages, and trainers. The target population were 26 apprentices and 4 trainers and the accessible population was 12 apprentices and 4 trainers. The study took place in Buea in Cameroon in two mechanic garages. The instruments used for data collection were questionnaire, observational checklist and interview guide. The procedure for data collection was through observing and training the expert on psycho-pedagogy skills who later trained the apprentice and they were later tested. Pretest and posttest were carried out. The study was carried out in two mechanic workshops. Each of the garages had experimental and control groups. The sampling technique was purposive sampling technique. Quantitative data were entered using EpiData Version 3.1 (EpiData Association, Odense Denmark, 2008) and analyzed using the Statistical Package for Social Sciences (SPSS) Standard version, Release 21.0 (IBM Inc. 2012). Data collected from the field were subjected to both descriptive and inferential statistics. For the descriptive data, frequency distribution tables and charts were used to present and describe the data obtained. Cohen's d was used to compare assert significant difference of the inferential statistics. The findings were as follows; executive function should constantly be applied in mechanic garages by the trainers so that apprentice can gain knowledge, aptitude, competencies and become productive.