Learning mathematic cannot be separated from the mathematical symbol and a numerical skill, which is required as ability to perform calculation and related matters with the numbers. This research is aimed to improve the numerical ability of students.  The method used was based on Borg and call, which consisted of ten main stages involved. The first research result is the validation of android-based mobile games edutainment, that is, the average value of the three experts is 78.33% with valid criteria. Then the average validation results of the android mobile game test questions based on edutainment is 77.77% with valid criteria. The second is the value of simplicity, seen from the value of the questionnaire which was filled in by all fresh graduates which was accumulated so that a percentage of 85.84% was obtained with very practical criteria. Furthermore, the effectiveness is seen from the increase in scores workmanship of fresh graduate pretest and posttest which is calculated by the formula T test results obtained by increasing the pretest posttest score then ability numerical increase so that it is categorized as effective. Thus it is concluded that the development of android mobile games is based on edutainment on numerical ability is categorized valid, practical, and effective for used

This research seeks to determine the relationship of part-time working and learning activities of economics education students at Teacher Training and Education Faculty in Mulawarman University 2019/2020 academic year by using quantitative method. The study's population was drawn from all part-time economic education students, a total of 20 persons. Product moment correlation, validity and reliability tests, and questionnaires were utilized to obtain data from respondents.  According to the findings, part time working is related to the learning activities. The product moment correlation test showed part-time working has a significance level of 0.001 less than 0.005 and a value of rcount > rtable of 0.682 > 0.444, indicating that the correlation strength is "Strong." The findings also tell the proportion of the link between part-time working and learning activities is 0.68 or 68 percent. This indicates that 68 percent of part-time working is linked to learning activities, while the remaining 32 percent is linked to other factors. Looking for additional money is the most common indicator of part-time working, whereas expressing ideas is the most common indicator of learning activities. As a result, the value of r count > r table and Ha is accepted, implying that the relevance of the relationship between part-time working and learning activities is significant.Keywords: Part-Time Working, Learning Activities.