In project-based learning, students are usually given a general question to answer, a concrete problem to solve, or an in-depth issue to explore. Teachers may then encourage students to choose specific topics that interest or inspire them, such as projects related to their personal interests or career aspirations. For example, a typical project may begin with an open-ended question (often called an “essential question” by educators): How is the principle of buoyancy important in the design and construction of a boat? What type of public-service announcement will be most effective in encouraging our community to conserve water? How can our school serve healthier school lunches? In these cases, students may be given the opportunity to address the question by proposing a project that reflects their interests. For example, a student interested in farming may explore the creation of a school garden that produces food and doubles as a learning opportunity for students, while another student may choose to research health concerns related to specific food items served in the cafeteria, and then create posters or a video to raise awareness among students and staff in the school.