Abstract-spatial abilities and spatial tasks are an essential part for succeeding in Science, Technology, Engineering, and Mathematics (STEM) programs. It is often said that individuals without spatial skills fail to make it in the Technical field and concepts such as drawing. This paper was aimed at developing pre-service teachers' spatial skill and improves their line-work in order to perform the Design process in the Technology subject excellently. A total of 41 pre-service teachers were selected purposively to take part in the study. A qualitative approach was used in a form of a Spatial Ability Test as well as Purdue Spatial Visualization Test of Rotations (PSVT: R) by Newton & Bristoll and Dr. Roland Guay respectively. The findings of the study found that spatial skills can be developed through spatial skill's diagnosis where drawing should be practiced in order to improve line-work usage. With spatial skills being developed and line-work usage being applied properly, pre-service teachers can perform the Design process with ease. Keyword-Design process, Engineering Graphics and Design, Spatial skill, Technology subject Introduction Spatial visualization skill has been recognized as a predictor of success in many technology-related fields, such as Engineering Graphics and Design (EGD) [24]. For engineering students, visualization skills can be very important for understanding fundamental concepts of technical drawing [1]. Findings by [22] stated that most of the EGD students encountered the problem of visualization in learning its concepts because current teaching and learning of EGD is via static drawing. The traditional teaching methods and approaches are not emphasizing the students' visualization skills [25]. Spatial abilities and spatial tasks are an essential part for succeeding in Science, Technology, Engineering, and Mathematics (STEM) programs. Spatial ability has been defined in many different ways by many different researchers over the years.[4] define it as, "individual differences used in the processing of non-linguistic information or individual differences in performance on spatial tests." According to [11], spatial ability can be broken down into three main factors: visualization, spatial orientation, and spatial relations. [14] defines visualization as "the ability to mentally manipulate, rotate, twist, or invert pictorially presented visual stimuli". This means that for any attempt in a given drawing, one ought to have a skill to rotate objects, visualize shapes and figure out how a drawing looks like when rotated, both in two and or three dimensional (2D/3D). On the other hand Technology is a subject that the Bachelor of Education pre-service teachers take in their First and Second years of their four year degree course. It is one of the major subjects that help in paying a way towards a third major subject choice when they do third year. In this case their third major subject could be Mechanical Technology, Information and Communication Technology and or any Science subjects. Therefore f...