Module 1 of Level 2, 3, & 4 Class for USNCO 2026 is Open for Signup!
Overview of Dr. Chen's USNCO Mentorship Program in 2025-26
Level 2 [Live + Recordings] - AP Plus & USNCO Local
Module 1 (25-26 live class open)
Module 2 (24-25 recordings available)
Module 2 (24-25 recordings available)
for motivated students taking AP Chemistry concurrently to prepare for Local 2026 (diagnostic test or email chen@dcho.us for consultation)
covers Stoichiometry, Atomic Structures, Periodicity, Molecular Structures, Bonding, IMFs, Gases in the level beyond AP
8:30-10 PM ET on Saturday
8 weekly sessions, late-Aug to mid-Oct
$399 for all live sessions, lecture notes, and problem sets in 2025-26
Module 2 (24-25 recordings available)
Module 2 (24-25 recordings available)
Module 2 (24-25 recordings available)
for students with a 5 in AP exam or motivated students taking AP Chemistry concurrently
covers Thermochemistry, Kinetics, Chemical Equilibrium, Acids&Bases, Buffer&Titrations, etc.
8 weekly sessions (12 hours in total), late-Oct to mid-Dec
$245 (discounted) for all recorded sessions, lecture notes, and problem sets in 2024-25
Module 3 (24-25 recordings available)
Module 2 (24-25 recordings available)
Module 3 (24-25 recordings available)
for students with a 5 in AP exam or motivated students taking AP Chemistry concurrently
covers Descriptive Chemistry, Laboratory, Fundamental Orgo/Biochemistry, Electrochemistry, Thermo
8 weekly sessions (12 hours in total), early-Jan to late-Feb
$245 (discounted) for all recorded sessions, lecture notes, and problem sets in 2024-25
Level 3 [Live + Recordings] - Post-AP & USNCO National
Module 1 (25-26 live class open)
Module 2 (24-25 recordings available)
Module 2 (24-25 recordings available)
for students who scored 35+ in USNCO Local 2025 or 4/5 in AP Exam to prepare for National 2026 (diagnostic test or email chen@dcho.us for consultation)
covers Advanced topics in Stoichiometry, Periodicity & Bonding, Coordination Chemistry, Reactions, etc. in the level of National Part I Exam
8:30-10 PM ET on Sunday
8 weekly sessions, late-Aug to mid-Oct
$449 for all live sessions, lecture notes, and problem sets in 2025-26
Module 2 (24-25 recordings available)
Module 2 (24-25 recordings available)
Module 2 (24-25 recordings available)
for students who scored 40 or higher in USNCO Local 2024 (email chen@dcho.us for consultation)
covers Integrated Chemical Principles [Kinetics, Thermodynamics, Equilibrium, Electrochemistry]
8 weekly sessions (12 hours in total), mid-Oct to mid-Dec
$299 (discounted) for all recorded sessions, lecture notes, and problem sets in 2024-25
Module 3 (24-25 recordings available)
Module 2 (24-25 recordings available)
Module 3 (24-25 recordings available)
for students who scored 40 or higher in USNCO Local 2024 (email chen@dcho.us for consultation)
covers Applications in Thermodynamics, Descriptive Chemistry/Laboratory, Advanced Organic Chemistry
8 weekly sessions (12 hours in total), early-Jan to late-Feb
$299 (discounted) for all recorded sessions, lecture notes, and problem sets in 2024-25
Level 4 [Live + Recordings] - High Honor & Study Camp
Module 1 (25-26 live class open)
Module 2 (24-25 recordings available)
Module 2 (24-25 recordings available)
for students who scored 35+ in the 2025 National Part I, aiming for High Honors/Study Camp. (diagnostic test or email chen@dcho.us for consultation)
covers Advanced Reactions, Coordination Chemistry, Analytical Chemistry, etc. in the level of National Part II Exam
8:30-10 PM ET on Friday
8 weekly sessions, late-Aug to mid-Oct
$499 for all live sessions, lecture notes, and problem sets in 2025-26
Module 2 (24-25 recordings available)
Module 2 (24-25 recordings available)
Module 2 (24-25 recordings available)
for award-winning students in the 2024 Nationals, aim for Study Camp and the U.S. Team.
covers IChO-level Chemical Principles with an emphasis of problem solving
8 weekly sessions (12 hours in total), mid-Oct to mid-Dec
$345 (discounted) for all recorded sessions, lecture notes, and problem sets in 2024-25
Module 3 (24-25 recordings available)
Module 2 (24-25 recordings available)
Module 3 (24-25 recordings available)
for award-winning students in the 2024 Nationals, aim for Study Camp and the U.S. Team.
covers IChO-level Integrated Organic Chemistry with an emphasis of problem solving
8 weekly sessions (12 hours in total), early-Jan to late-Feb
$345 (discounted) for all recorded sessions, lecture notes, and problem sets in 2024-25
Detailed Introduction to Module 3 in 2024-25
Recording of Session 1 in 2024-25
In-Depth, On-Demand – Learn with Dr. Chen’s Class Recordings
Want to study for the Chemistry Olympiad at your own pace and convenience? Now you can!
Get exclusive access to Dr. Chen’s full set of class recordings, organized by Level (2, 3, or 4), and now offered at a big discount. An extra $50/$100 bundle discount is offered for purchasing two/three modules together!
Each recording packet includes:
- Comprehensive lecture recordings from Dr. Chen’s live sessions
- All study materials, including detailed Lecture Notes
- Challenging weekly homework sets with solutions
- Structured by USNCO topic, progressing from fundamentals to advanced concepts
Perfect for motivated students preparing for the Local or National Exams—or anyone looking to boost their chemistry skills independently.
Start anytime, progress at your own pace, and build your mastery with the best-in-class resources.
Ready to begin? Click the "Purchase" button under each Level/Module!
Preparing for USNCO 2026?
Choose the path that fits you best:
1. Take Live Lessons with Dr. Chen – weekly class from late Aug to early Apr
- Taking AP Chemistry in the fall --> Level 2
- Completed AP Chemistry --> Level 3
- Aiming for Winning National --> Level 4
- Not sure which Level? --> take the diagnostic test
2. Prefer to begin right away? – Self-paced
Purchase recordings and class materials for Level 2, 3, or 4 and Summer Organic Chemistry in 2024-25 and start learning at your own pace!