This paper introduces a technical drawing course starting with three-dimensional CAD (3D CAD). Anan National College of Technology had offered drafting education to the first-year students of four different departments under their independent curricula until the new curricula were launched and started a department-mixture course of technical drawing with a syllabus common to all four departments in 2008. The new course of technical drawing starts with drawing solid models on a computer with 3D CAD. This method is effective in training students to build three-dimensional images in their mind. The students go on to learn how to draw isometric and multi-view projections of solid models. The implementation of the new syllabus shows it is effective to develop students' ability to conceive three-dimensional images before teaching them how to draw plane figures.