Turn your students into science detectives with this NO PREP, engaging, real-world investigation focused on immune system malfunction and autoimmune disorders. In this case file activity, students analyze laboratory data, examine inflammatory markers, evaluate antibody test results, track immune pathways, rank possible causes, and build a scientific case to solve the mystery of why patients are experiencing joint pain, chronic fatigue, skin rashes, organ inflammation, and recurring symptom flare-ups.

Instead of passively reading about the immune system and autoimmune disease, students actively investigate, analyze patterns, and reason through the evidence to uncover how immune misidentification leads to chronic inflammation and tissue damage. It makes a complex biology topic interactive, engaging, and easy to understand.

✅ NO PREP, no formatting, no issues.
Simply download and go. Includes all instructions, answer key, rubric, and background reading students need to solve the case. This mystery is included inside my Human Body Systems & Health Mystery Activity Bundle.

10-Part Activity Breakdown

Part 1 – Mission Briefing:
Students are introduced to Case File #914 involving patients experiencing joint swelling, fatigue, inflammation, organ dysfunction, and recurring symptom flare-ups without active infection.

Part 2 – Background Reading:
Students build foundational knowledge about the immune system, inflammation, antibodies, immune regulation, and how autoimmune disorders develop.

Part 3 – Evidence Log:
Students examine 10 detailed evidence cards related to elevated CRP and ESR, autoantibodies, absence of infection, joint inflammation, tissue biopsy findings, genetic risk factors, organ dysfunction, fatigue, and improvement with immunosuppressive medication.

Part 4 – Suspect Ranking:
Students rank possible causes of immune malfunction (genetic predisposition, environmental triggers, immune misidentification of self-cells, chronic inflammation, hormonal/regulatory imbalance) and justify their reasoning using scientific evidence.

Part 5 – Pathway Tracking:
Students trace how immune malfunction spreads from trigger → immune misidentification → autoantibody production → inflammation → tissue damage → organ dysfunction.

Part 6 – Impact Analysis:
Students analyze how autoimmune activity affects organs (joints, skin, thyroid, kidneys), cells (antibody targeting and tissue damage), and overall body health (chronic fatigue and systemic inflammation).

Part 7 – The Big Question:
Students explain how immune system malfunction developed into a serious body-wide health problem.

Part 8 – CER Writing:
Students construct a scientific argument using Claim–Evidence–Reasoning.

Part 9 – Solutions & Action Plan:
Students propose personal, community, and medical strategies to regulate immune response and reduce inflammation.

Part 10 – Reflection:
Students reflect on how immune balance impacts long-term health and why early detection is important.

What Students Will Learn

• How the immune system normally protects the body
• The difference between healthy, weakened, and overactive immune responses
• What autoantibodies are and why they are harmful
• How chronic inflammation damages tissues and organs
• Why autoimmune disorders involve flare-ups
• How genetics may increase autoimmune risk
• Why early autoimmune symptoms are difficult to detect
• How inflammatory markers like CRP and ESR indicate immune activation
• Why symptoms improve with immunosuppressive medication
• How to use Claim–Evidence–Reasoning (CER) to support scientific explanations

This activity blends life science, human biology, health science, critical thinking, and literacy skills into one high-interest, structured lesson that keeps students thinking like real public health investigators.

You can find this Mystery Activity as well as the others I have created inside my Human Body Systems & Health Mystery Activity Bundle at a significant discount.

This Mystery Is Perfect for:

• Life science and human body systems units
• Health and physiology classes
• Immune system lessons
• Sub plans, review days, or project-based learning

No prep, no formatting, no issues.

Simply download, print (or upload to your class site) and you're all set.

What’s Included

• A complete student case file with guided worksheets for every step of the investigation
• 10 detailed evidence cards based on real-world medical issues --> Evidence cards include two versions: one with images and one without images
• A full teacher answer key with sample responses and grading support
• A full marking rubric that covers all key aspects of the mystery activity

Why Teachers Love This Resource

• Fully structured and print-and-go – Everything is ready to use with clear directions and built-in scaffolding
• High engagement without extra classroom management – The detective format naturally hooks students
• Real-world relevance students immediately understand
• Builds both science and ELA skills – Includes analysis, explanation, and CER writing
• Flexible for any schedule – Use in one class period, over two days, or as a mini-project

Time Required

• 2 class periods
• Can be extended into a 3-day mini-project

The following Mystery Activities can be found inside my Human Body Systems & Health Mystery Activity Bundle.

1. The Circulatory System Breakdown Mystery
2. The Digestive System Malfunction Mystery
3. The Viral vs Bacterial Illness Mystery
4. The Cellular Respiration Breakdown Mystery
5. The Stress Response & Health Breakdown Mystery
6. The Integumentary System Disorder Mystery
7. The Respiratory System Failure Mystery
8. The Antibiotic Resistance Mystery
9. The Oxygen Delivery Crisis Mystery
10. The Substance Abuse Impact on Body Systems Mystery
11. The Blood Sugar Balance Mystery
12. The Foodborne Illness Outbreak Mystery
13. The Musculoskeletal System Injury Mystery
14. The Nutrition and Diet Health Mystery
15. The Sleep Deprivation Health Mystery
16. The Autoimmune Disorder Mystery
17. The Blood Types Mystery
18. The Dehydration & Electrolyte Imbalance Mystery
19. The Immune System Breakdown Mystery
20. The Screen Time Addiction & Mental Health Mystery

Google Classroom and Distance Learning Ready

• This resource is perfect for in-class or distance learning and integrates seamlessly with Google Classroom.
• It automatically creates a copy of the reading and places it directly into your Google Drive with a single click.
• Purchase → Open → Click → Assign to your students
• The reading also includes a Microsoft Word and PDF version.
• Having all three options allows you to assign the activity without worrying about formatting issues, and ensures access for all students regardless of device or learning environment.

No prep, no formatting, no issues. Simply download, print (or upload), and you're all set.

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If you have any questions please feel free to send me an email - devon@teachwithfergy.com