MSTT is a set of tasks constructed to understand students’ manipulative skills during the transition from primary to secondary school. It is developed based on analysis of related documents, specifically the science practical manuals, science curriculum specification, science text books, and science teaching and learning materials for both primary and secondary level. The tasks require students manipulate four basic scientific apparatus: thermometer, measuring cylinder, Bunsen burner, and light microscope. The researchers construct these tasks because the main objective of this practical activity was to understand the students’ ability in using the scientific apparatus rather than focusing on the result of the practical activity. The procedures of the experiments in MSTT have been simplified, as compared to the procedures in the text book. For example in the text book, detailed instructions was given such as ‘measure 100 ml of water by using measuring cylinder’ and ‘stir the solution by using glass rod’. However in MSTT, the instruction; ‘measure 100 ml of water’ and ‘stir the solution from time to time’ was given instead. The MSTT consisted of two sets of activities. The first set of activities was developed for grade 6 students and the second set was for grade 7 students. The content of these tasks was based on the science curriculum specification for the respective grade. The tasks were not created to evaluate students’ knowledge on the scientific concepts, but specifically developed to measure students’ mastery of manipulative skills in using and handling of the apparatus.