The present work is dedicated to evidence the importance of the practical lessons with real tools and machines for the students of technical and engineering. A sample of 24 students in 4 groups participated during the evaluation of the practical lessons. These students take a course named manufacturing of mechanical components (MMC); here they are instructed about the employ of some tools and machines and how to perform during real manufacturing in small offices and laboratories to create special mechanical components. At the end of the course the students were agreed that practicing is absolutely necessary in technician and engineering courses and they coincided in the fact that this is also a good way to reinforce theory and recognize its importance for a better formation.