Abstract-This study aims to: (1) the development of a prototype model of student skills assessment instruments on the web programming practicum; (2) a prototype feasibility assessment assessment instrument in the skills skill of S MK students on a web programming practice; and (3). techniques on web programming techniques. This research is a research and development of Research and Development (R & D) method that adapted 4-D development research model. The subje cts of the product trial were teachers and students of class X S MKN 6 Malang, S MKN 11 Malang, and S MKN 3 Malang which required 90 students for trials and 10 students for a limited trial. The product eligibility was validated by 2 evaluation experts and 1 practitioner. S kills tests are performed by comparing posttest scores between groups using technical assessment tools with groups not using technical skills assessment instruments. Data comparison with an interview and questionnaire Data were analyzed descriptively quantitative. The results of the research indicate that: (1) has produced a technical skill assessment instrument developed manually and supplemented by instructions for use, scoring guidelines, student worksheets, basic, practical work), and assessment questions and rubrics. (2) the resulting product is feasible to be used for practical learning process based on expert validation, limited testing, and field trials, while for product feasibility the average validation is 95,14% and cronbach alpha value 0,75; and (3) an effective web programming skill assessment tool improves student competence.