The main goals of this study were to look after the technological knowledge construction process by high-school high-achievers, and their ability to design and implement solutions for technological problems. More specifically, we examine the contribution of Project-based-learning (PBL), as pedagogical means for supporting the students' knowledge acquisition and problem-solving process. The findings show a significant increase in formal knowledge as measured by standardized matriculation exams; an expansion in the scope of technological knowledge acquired and implemented, and in the scope of knowledge resources utilized for the projects; a high level of overall performance as regards to the set of design skills studied; a positive change in attitude towards technology and technological studies; the emergence of consistent design styles by individuals and groups along their work in the projects.Keywords Project-based learning AE Design learning AE Design styles AE Technological knowledge AE High-achieversThe number of high-school students who choose to learn technological education is decreasing consistently in many countries, including Israel. Moreover, most of the students in technology education tracks belong to the mid and low achievers amongst the high-school population. Both aspects-the decrease in number of students and the reticence of high achievers to learn technology-stand in contradiction with the demand imposed by the massive integration of current technologies in all areas of life (e.g., economy, security, health treatments and services, leisure culture, quality of life in general), for more technologically literate and knowledgeable citizens in one hand, and more professionally-trained human resources in the other. The actual challenge is therefore twofold: to ensure the acquisition of an appropriate technological knowledge base by the population at large, and at the same time to attract high-achievers to high-quality technological studies.The study presented in this paper focuses on the second challenge, namely, the planning and implementation of technological studies for high-school high-achievers who learn in comprehensive schools (not in specialized technology-education programs). The main goals of the study were to examine the technological knowledge construction process by these students, and their ability to design and implement solutions for technological problems. More specifically, we examine the contribution of Project-based-learning (PBL), as pedagogical means for supporting the students' knowledge acquisition and problem-solving process.