Table 1.

Timeline of the learning activities and data collected from the students

Event	Unit topic	Learning activity/data collection
1 week before the start of a unit		• Pre-course survey
Lesson 1	Basic operation of SketchUp	Before the lesson • Watching online instructional videos • Online quiz During the lesson • Class discussion: Examples of 3D chair model were presented to help students understand the task • Assignment: Students were required to follow procedures described in the handout and create a simple 3D chair model for assignment 1 • Brainstorming: Students tried to formulate their own design with peers to create a new 3D model
Lesson 2	Other common tools and features of SketchUp	Before the lesson • Watching instructional videos • Online quiz During the lesson • Assignment: Students continued to work on assignment 1 and had to finalize the design • Student demonstration After the lesson • Assignment submission: Students were required to submit assignment 1 for grading before the start of lesson 3
Lesson 3	Advanced features of SketchUp	Before the lesson • Watching instructional videos • Online quiz During the lesson • Assignment: Students were required to design and create another 3D model (e.g. a house, cartoon character, car) for assignment 2
Lesson 4	SketchUp Project	Before the lesson • Watching instructional videos • Online quiz During lesson • Assignment: Students continued to work on Assignment 2 and had to finalize the design • Share own designs • Complete post-course survey After the lesson • Focus group interview