Pass the ISA Certified Arborist Exam - or get your money back.
Most people fail because they study the wrong things. Get the expert-led system built for first-try success — without wasted hours.
- ✅ 6+ Hours of Expert Video Lessons
- ✅ 4,500+ Flashcards & Full Glossary
- ✅ Unlimited Mock Exams (Simulate the Real Thing)
- ✅ 60-day study plan (or 30-day fast track)
Pass guarantee: complete the full course and if you do not pass your first attempt, you can request a full refund.
⚡ Instant Access • Pass guarantee with full course completion
Take a look at the platform
Click to watch the overview
60% of ISA exam candidates fail on their first attempt
Without proper preparation, candidates struggle with complex topics, waste time on irrelevant materials, and lose confidence before exam day.
Overwhelmed by study materials
Lose confidence and motivation
Fail the exam
All you need to pass theISA Certified Arborist Exam
Built for first-try success and backed by a pass guarantee when you complete the full course.
- Expert-created content by Chris Comer covering every section of the ISA Certified Arborist Exam. Our educational platform includes detailed lessons on tree biology, soil science, tree identification, pruning techniques, safety practices, and all exam topics with pass-guaranteed methodology.
- Test your knowledge with comprehensive quizzes designed to mirror the actual ISA exam format. Our educational platform features adaptive learning with detailed explanations for every answer, helping you identify weak areas and build confidence through targeted practice.
- Learn from Chris Comer through high-quality video recordings that bring complex arboriculture concepts to life. Our technical infrastructure delivers crystal-clear video content covering tree identification, pruning demonstrations, safety protocols, and exam strategies.
- Enhance your understanding with detailed visuals, diagrams, and infographics covering tree anatomy, disease identification, pruning cuts, and safety equipment. Our user experience (UX) design ensures all visual materials are clear, accessible, and optimized for learning retention.
📝Free · No signup needed
Don't guess. Test your readiness for free.
Take a 100-question practice exam, weighted across all 10 ISA domains. 105 minutes — same pacing as the real test. Get an honest, domain-by-domain breakdown of where you actually stand before committing to anything.
Takes about 105 minutes · No payment, no signup.
100 questions
Domain-weighted to match the real exam.
105 minutes
Same pacing as the certification test.
All 10 domains
Tree Biology, Pruning, Safe Work, and the rest.
Instant breakdown
See your strongest and weakest areas.
Learn from an ISA-focused instructor
"My passion is helping arborists succeed. With almost 20 years in the industry and experience educating hundreds of certified arborist test takers, I understand exactly what it takes to pass the ISA exam. This comprehensive course combines my expertise with proven learning methods to ensure your success."
Why TreeNerdAcademy is a No-Brainer
Stop renting your education. Own your future.
TreeNerdAcademy
The New Way
Total Investment
Returns to $249 after 3 enrollments
Access
Own it
Content
+ 100+ Text Lessons
4,500+ Practice Questions
Flexibility
Mobile Friendly
Arborist trained AI
Arb AI Tutor
Access to Community
Mock Exams
Pass guarantee
With full course completion
TreeU
The Rental Model
Total Investment
Recurring
Access
Rent
Content
Practice
Non interactive
Flexibility
Arborist trained AI
Access to Community
Mock Exams
Pass guarantee
Chapter Courses
The Old Way
Total Investment
Per Event
Access
Live Only
Content
Zoom/Live
Practice
Flexibility
Inconvenient
Arborist trained AI
Access to Community
Mock Exams
Pass guarantee
Master the ISA exam with
proven learning methods
Interactive Flashcards
Master key concepts with our comprehensive flashcard system covering tree identification, diseases, and arboriculture terminology.
Tree Identification
Expert Video Content
Learn directly from Chris Comer through high-quality video lessons covering complex arboriculture concepts.
Tree Biology Fundamentals
Chris Comer • 15:32 • Completed ✅
Pruning Techniques & Best Practices
Chris Comer • 22:15 • In Progress 🔄
Soil Science for Arborists
Chris Comer • 18:47 • Not Started ⏸️
Comprehensive Text Content
Detailed written materials covering every section of the ISA exam with clear explanations and examples.
Tree Biology
100%Soil Science
85%Tree Identification
60%Safety Practices
40%Pruning & Maintenance
25%Mock Exams
Practice with realistic exam simulations that mirror the actual ISA Certified Arborist Exam format.
Practice Exam #1
85%Practice Exam #2
92%Pricing
Pass the ISA Certification Exam on Your First Try.
Save $50-$70 today. Price jumps to $249 / $299 when the last 3 are gone.
Pass guarantee with full course completion.
Practice Pack
Just the drills. Practice questions and mock exams — nothing else.
$60
USD
- 4,500+ exam-mirroring questions
- Unlimited mock exams (Full / Half / Mini)
- Active recall flashcards with performance tracking
- Does NOT include 100+ lessons
- Does NOT include 6 hours of video
- Does NOT include Arb AI Tutor
- Does NOT include Lifetime Community Access
- Does NOT include Tree Nerd Academy Podcast
- Does NOT include Complete Arborist Glossary
The Self-Study Protocol
The complete toolkit to study at your own pace and dominate the exam.
$249
$199
USD
- Pass guarantee with full course completion (full refund if you do not pass)
- 6+ hours of concise video lessons
- 4,500+ exam-mirroring questions
- Unlimited mock exams (real test simulation)
- Arb AI Tutor + Active Recall Flashcards
The Inner Circle Edition
Never get stuck. Get certified faster with lifetime support and expert access.
$299
$229
USD
Only $30 more for Lifetime Support
- Pass guarantee with full course completion (full refund if you do not pass)
- Everything in Self-Study (Videos, AI, Flashcards, Mock Exams)
- Lifetime Community Access — Join a network of serious arborists
- Career Networking — Connect with professionals who are already winning
- Tree Nerd Academy Podcast — Exclusive episodes breaking down the exam
How it works
From zero to passing in 60 days.
A simple, repeatable daily routine that walks you through every ISA domain — weighted to match the real exam.
Step 1 · Learn
Domain-by-domain video lessons + readings (~1 hr/day).
Step 2 · Drill
Lock it in with 4,500+ exam-mirroring practice questions.
Step 3 · Simulate
Unlimited 200-question mock exams under the real timer.
Includes a 30-day fast track for working arborists.
See How It Works
ISA Exam Resources
Start with these high-impact guides for exam domains, scheduling, eligibility, and study strategy.
ISA Study Schedule Template and Weekly Checklist
"A printable ISA exam study schedule template with weekly checklists, domain assignment by week, and daily study targets."
TreeNerd Academy vs TreeU: Which ISA Prep Course Is Right for You?
"Comparing Tree Nerd Academy vs. TreeU arborist prep course: price, content depth, practice questions, AI tutor, and pass guarantees."
Arborist Safety PPE: What You Will Be Tested On
"PPE and climbing safety is heavily tested on the ISA exam. Learn chainsaw PPE, climbing harness specs, and ANSI Z133 safety rules."
ISA Exam Glossary: Core Terms You Must Know
"The 50+ ISA exam vocabulary terms most likely to appear on your test — from CODIT to CRZ, fascicle to phenology, and TPZ to WLL."
ISA Exam Flashcards: How to Use Spaced Repetition
"Spaced repetition beats re-reading every time. How to use Anki or Tree Nerd Academy flashcards to retain ISA exam concepts for test day."
How to Build a Weekly Study Routine That Actually Sticks
"Build an ISA exam study routine that works around a full-time job. Templates for 30-min, 1-hour, and 2-hour daily study blocks."
Traditional exam prep vs. our comprehensive course
Studying without our course
- Overwhelming amount of study materials
- No expert guidance on what to focus on
- Limited practice with real exam questions
- Outdated or incomplete information
- No pass guarantee
Studying with our comprehensive course
- Structured, focused learning path
- Expert guidance from Chris Comer
- Practice exams mirroring the real test
- Up-to-date, comprehensive content
- Pass guarantee with full course completion
FAQ
Frequently Asked Questions
¿Hablas Español? 🇪🇸
TreeNerd Academy is also completely available in Spanish. Access our expertly translated prep course to accelerate your journey!
Visitar TreeNerdAcademia.com- You get video lessons, practice questions, mock exams, flashcards, and a glossary aligned to ISA Certified Arborist exam domains.
- Most students complete the program in 60 days at about 1 hour per day, following our day-by-day study plan that covers all 10 ISA domains, weighted by exam importance. We also offer a 30-day fast track for working arborists who already have field experience and need to lock in exam-specific knowledge. See the full calendar at /study-plan.
- It's recommended but not required. The Arborists' Certification Study Guide (ISA, latest edition) is the source of truth our content is built around. Our videos and lessons stand on their own, but reading the matching textbook chapter alongside each daily lesson helps the material stick faster. The textbook is sold separately on isa-arbor.com — we don't resell it.
- Sign in at treenerdacademy.com/dashboard with the same email used at checkout to unlock immediate access.
- You keep lifetime access, including future updates to relevant prep material.
- Yes. If you complete all course materials and do not pass the ISA Certified Arborist Exam on your first attempt, you can request a full refund within 30 days of the exam date.
- To request a refund, you must complete at least 90% of lessons before your exam date, watch all course videos, use the platform as intended, and provide valid exam results showing you did not pass.
- Yes. Content is reviewed and refreshed to stay aligned with current ISA exam expectations and arboriculture best practices.
- Yes. The platform is optimized for desktop, tablet, and mobile so you can study from the field or office.
- You can contact support through the platform and get help with account, billing, or access issues.
Start your journey to becoming a certified arborist today
Join thousands of successful arborists who passed the ISA exam with Chris Comers comprehensive videos. Expert content, interactive learning, community and plenty of practice reps.
Pass guarantee: complete the full course and if you do not pass your first attempt, you can request a full refund.
Enroll in the Course Now
Real arborists. Real results.
From the ISA study community — what students say after passing with Tree Nerd Academy.