A great job, congrats.
I learnt Scilab from spoken tutorials which were recommended to me while doing my B.Tech at IIT-Bombay. I then used Scilab extensively for my research work and hence became an expert in it. This internship was very helpful to me because taking up the task of writing Scilab codes forced me to go out of my comfort zone and actually code the examples of the book which I would not have done otherwise on just reading the book. By coding, my understanding increased manifolds because unless the codes were perfect and every small bit was addressed the answer would not come. Through this detailed process of learning I could start appreciating the different concept spread throughout the textbook and my confidence increased a lot. Since I had to anyways read the book, by taking up the task of writing codes, not only did I learn the book better, I even stand to get paid. So it is a win-win situation. I will definitely recommend other students to take up writing codes for the textbook companion project.
I Learnt Scilab from help topics, online pdfs and by downloading completed books codes and interpreting them. I have benefited in a lot many ways. I got to learn something new and its good to be a part of this emerging language. It also helped me understand my book subject thoroughly.
I would like to say that I learned Scilab through spoken-tutorial.org. I have benefited lot from this internship. It help in improving my knowledge in the field of Fluid Power. It also helped in securing good scores in my academics. Along with that, it also help me in learning programming which i can further use in my respective field.
I hope you may get plenty of useful feedback from all over India. You have done a great job, Starting from five books in 2010 to more than 500 books in 2013.