262 Int. J. Innovation and Learning, Vol. 28, No. 2, 2020 Copyright © 2020 Inderscience Enterprises Ltd. Study on assessment and factors supporting successful vocational high schools student of industrial class Wirawan Sumbodo* and S. Supraptono Department of Mechanical Engineering, Faculty of Engineering, Universitas Negeri Semarang, Semarang, Indonesia Email: jwirawansumbodo@gmail.com Email: supraptono@mail.unnes.ac.id *Corresponding author Anwar Meddaoui Laboratory of Smart Systems and Industrial Optimisation, Hassan II University of Casablanca, Engineering School ENSAM Casablanca, Morocco Email: ameddaoui@gmail.com S. Samsudi and Joko Widodo Universitas Negeri Semarang, Semarang, Indonesia Email: samsudi@mail.unnes.ac.id Email: jokowidodo@mail.unnes.ac.id Abstract: The purpose of this study is to investigate the learning effectiveness of the industrial class of vocational high schools (VHS) and to identify the required factors to improve VHS students’ skill. This research is an ex-post facto type of causal research to reveal occurred events and to see various factors related to the events. Data collection of learning effectiveness assessment and factors supporting successful VHS students’ identification were done through focus group discussion (FGD), interviews, questionnaires, and pre-test-post-test. The samples were 30 students of the industrial class and 30 students of the regular class of class XI TP1. The result shows that the average grade of an industrial student is 81, while the average grade of a regular student is 70. Keywords: vocational high school; VHS; effectiveness; learning; student skill; industrial class. Reference to this paper should be made as follows: Sumbodo, W., Supraptono, S., Meddaoui, A., Samsudi, S. and Widodo, J. (2020) ‘Study on assessment and factors supporting successful vocational high schools student of industrial class’, Int. J. Innovation and Learning, Vol. 28, No. 2, pp.262–275.