This study highlights the necessity and effects of using worksheets to identify and correct potential gaps, to validate prior knowledge that will be related to new information, concepts, or procedures, as well as the use of portfolios for gathering, selecting, and structuring information to be utilized in later stages. The study involved 79 students aged 16-17, of both genders, from three 10th-grade classes at "Al. Papiu Ilarian" National College in Târgu-Mure?. To achieve the research objectives, students were engaged in a project-based learning activity. The students went through several stages, with the current study detailing the documentation phase. The necessity of involving students in practical experiences for the development of critical thinking and scientific skills is emphasized.