The Sir Isaac Newton (SIN) Exam is a free physics competition designed for high school students and is administered by the Department of Physics & Astronomy at the University of Waterloo. The primary objective of the SIN Exam is to promote the teaching and enjoyment of physics through a challenging yet engaging test that incorporates humor and creativity. The exam is known for its unique approach, making physics fun and less stressful since it doesn't affect university admissions. The curriculum of the SIN Exam covers fundamental physics topics, primarily focusing on classical mechanics, as outlined by the Ontario Secondary School Physics Curriculum. It is designed to test students' ability to apply basic physics concepts to solve complex problems, with a particular emphasis on logical reasoning and common sense. The exam is available to students from any grade level and is primarily aligned with the Canadian physics curriculum, though students from the USA and abroad also participate. The SIN Exam is delivered online and is typically administered in a supervised environment at participating schools. Students have the option to use school computers or bring their own laptops. The exam takes place over a two-hour period, with schools choosing the most convenient time within the designated day. The contest is scheduled for the first Thursday of May, with registration opening in early March and closing in late April. Login credentials for the exam are provided to teachers ahead of the exam date. The SIN Exam aims to challenge and inspire students without the pressure of affecting their academic standing. Participants gain valuable problem-solving skills and deeper insights into physics, with opportunities to win scholarships and book awards. The top papers are hand-graded to determine scholarship recipients, and teachers can print certificates and access results post-exam.