The purposes of this research were 1) to develop the online computer assisted instruction in technology subjects (computing science) on using Microsoft Excel 2010, 2) to evaluate the quality of the content of online computer assisted instruction in technology subjects (computing science) on using Microsoft Excel 2010, and 3) to evaluate the quality of the technique and methodology of the online computer assisted instruction in technology subjects (computing science) on using Microsoft Excel 2010.

The research results showed that 1) the online computer assisted instruction in technology subjects (computing science) on using Microsoft Excel 2010 consisted of 3 units, 2) the online computer assisted instruction in technology subjects (computing science) on using Microsoft Excel 2010 had the quality of the content at a high level (  = 4.15, S.D. = 0.37), and 3) the online computer assisted instruction in technology subjects (computing science) on using Microsoft Excel 2010 had the quality of the technique and methodology at the highest level (  = 4.78, S.D. = 0.12).