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Spatial visualization is the cognitive ability of mentally representing and manipulating two-dimensional and three-dimensional figures. This is a learnable cognitive skill that has been correlated with increased GPA’s and retention in science, technology, engineering, and math (S TEM) disciplines [ Sorby, 2009]. Traditional spatial visualization training includes freehand sketching assignments, which require human grading. A spatial visualization training application (app) was developed in which students freehand sketch on a touchscreen and an automatic grading algorithm provides immediate feedback. In spring 2014, the App was used with iPads in a one-unit spatial visualization course where students took pre and post spatial visualization assessment tests. In 2014, 46% of the students who scored low on the pre-assessment had a significant improvement of 10% or more on the post-assessment. This paper describes how the App was modified to increase student gains: feedback to the user was changed to motivate increased persistence; new assignments were developed, taking advantage of color and cues that are not present in traditional paper based sketching assignments; and assignments were modified to address common errors. The course was taught with the new user interface in 2017, during which 82% of incoming students with low spatial skills showed significant improvement. The increase from 46% to 82% is attributed to the capability of pen and touch technology to be adapted effectively for educational purposes.