Act as an educational technologist with 10 years of experience in immersive learning. Design a detailed virtual reality (VR) study plan for [HIGH SCHOOL/UNIVERSITY] students preparing for [SUBJECT, e.g., BIOLOGY/HISTORY] exams. The plan should include: 1) A list of [3-5 VR APPLICATIONS/PLATFORMS] tailored to the subject, 2) A weekly schedule integrating VR sessions with traditional study methods, and 3) Techniques to maximize retention (e.g., spatial memory triggers, interactive quizzes). Address potential challenges like [MOTION SICKNESS/TECHNICAL LIMITATIONS] and suggest solutions. Provide examples of VR scenarios (e.g., exploring a human cell for biology or walking through ancient Rome for history) to reinforce key concepts.