摘要：This research was aimed to know the validity, effectiveness and practicality of Macromedia Flash development in learning media so that it can improve the students’ spatial ability. This research subject was eighth grade students of SMP Negeri 1 Batang Kuis 2019/2020. This research object was Macromedia Flash application in Mathematic subject of solid geometry (cube and cuboids) using Problem-Based Learning. This research instrument was testing the spatial ability. This is a development research which used 4-D development model. The result of this research is valid known from the learning media validity score with the average of 4.55 from the media expert and 4.64 from learning material expert, then the validity score total of lesson plan is 4.48; worksheet is 4.62; the spatial ability test and Mathematic learning motivation survey are also valid. The mathematic learning media which was developed is effective, known from students’ learning mastery calcically reached 91.99%. The improving of students’ spatial ability used learning media which was developed on solid geometry subject (cube and cuboids), shows the increasing in average score from 67.93 to 84.13 .The average score of each spatial ability indicator is also increasing.
关键词：macromedia flash; problem based learning; spatial ability
