The AP Environmental Science curriculum spans eight units: energy, ecosystems, populations, earth systems and resources, land and water use, energy resources and consumption, atmospheric systems, and global change. Each unit builds on the previous one, so understanding early concepts like photosynthesis and nutrient cycles is essential for tackling later topics like climate change and human impacts. Personalized tutoring can help you identify which units are giving you trouble and create a focused study plan.

The AP Environmental Science exam has two sections: a 90-minute multiple-choice section (80 questions) and a 90-minute free-response section (3 questions that require written explanations and calculations). The multiple-choice questions test your understanding of concepts and ability to interpret graphs and data, while free-response questions require you to apply knowledge to real-world scenarios. Success depends on both conceptual understanding and comfort with pacing—many students benefit from timed practice tests to build speed and confidence.

Students often struggle with energy flow and nutrient cycling (understanding how energy transfers through ecosystems), quantitative skills like calculating population growth rates, and connecting local environmental issues to global systems. Reading comprehension and data interpretation are also common pain points, especially when exam questions present unfamiliar graphs or scenarios. Tutors can break down these abstract concepts with concrete examples and give you practice with the specific question formats you'll see on test day.

Score improvement depends on your starting point and effort level, but most students see meaningful gains—typically 1-3 points on the 5-point scale—when they work with a tutor consistently over several months. The biggest improvements come from identifying weak topics early (usually by October), building a structured study plan, and completing regular practice tests with feedback. Since St. Louis has 40 schools with varying AP programs, a tutor familiar with your specific curriculum can target exactly what your school emphasizes.

A solid approach is to spend 4-5 hours per week on APES starting in September, with time split between reviewing class notes, reading the textbook strategically, and working practice problems. By January, increase to 6-8 hours weekly and begin full-length practice exams every 2-3 weeks to build test-taking stamina and identify weak areas. In the final 6 weeks before the May exam, focus on your lowest-scoring units and refine test-taking strategies like time management and eliminating wrong answers efficiently.

Look for tutors with a background in environmental science, biology, or earth science who have experience teaching AP-level content and are familiar with the current exam format. Ideally, they've helped other 9th graders prepare for APES and can speak to common misconceptions and effective study strategies. Varsity Tutors connects you with expert tutors who understand both the subject matter and how to teach it to high school students at your level.

Your first session typically focuses on understanding where you stand: reviewing recent tests or assignments, identifying which topics feel solid and which are confusing, and learning about your learning style and goals. The tutor will also explain how they approach APES—whether they emphasize concept mastery first, test-taking strategy, or a mix of both—so you know what to expect going forward. From there, you'll create a personalized plan that targets your specific needs, whether that's catching up on early units or preparing for the exam.