Dr. Chen is proud to have coached 4 Campers and 19 High Honors/Honors in USNCO 2025!

Decoding of Chemistry Olympiad

Decoding of Chemistry OlympiadDecoding of Chemistry OlympiadDecoding of Chemistry Olympiad

Decoding of Chemistry Olympiad

Decoding of Chemistry OlympiadDecoding of Chemistry OlympiadDecoding of Chemistry Olympiad
  • Home
  • About
  • USNCO
    • General Overview
    • FAQs
    • Learning Objectives
    • DCC
    • Annotated Solutions
    • Misconception
    • Laboratory
    • Study Camp
  • Classes
    • Registration
    • Recordings
    • Placement
    • Testimony
    • Open Classes
    • Lecture Notes
  • Resources
    • APChem
    • Textbooks
    • IChO
    • CChO
    • Mendeleev
    • VChO
    • WUCT&BCT
    • Other Sites
  • Consultation
    • Newsletters
    • Email
    • Discord
    • WeChat 微信
  • More
    • Home
    • About
    • USNCO
      • General Overview
      • FAQs
      • Learning Objectives
      • DCC
      • Annotated Solutions
      • Misconception
      • Laboratory
      • Study Camp
    • Classes
      • Registration
      • Recordings
      • Placement
      • Testimony
      • Open Classes
      • Lecture Notes
    • Resources
      • APChem
      • Textbooks
      • IChO
      • CChO
      • Mendeleev
      • VChO
      • WUCT&BCT
      • Other Sites
    • Consultation
      • Newsletters
      • Email
      • Discord
      • WeChat 微信
  • Home
  • About
  • USNCO
    • General Overview
    • FAQs
    • Learning Objectives
    • DCC
    • Annotated Solutions
    • Misconception
    • Laboratory
    • Study Camp
  • Classes
    • Registration
    • Recordings
    • Placement
    • Testimony
    • Open Classes
    • Lecture Notes
  • Resources
    • APChem
    • Textbooks
    • IChO
    • CChO
    • Mendeleev
    • VChO
    • WUCT&BCT
    • Other Sites
  • Consultation
    • Newsletters
    • Email
    • Discord
    • WeChat 微信

Module 1 of Level 2, 3, & 4 Class for USNCO 2026 is Open for Signup!

Signup NOW!

Overview of Dr. Chen's USNCO Mentorship Program in 2025-26

Sign up for Module 1 Live Class of Level 2, 3 & 4

Module 1 (Level 2)

Module 1 (Level 2)

Module 1 (Level 2)

for motivated students taking AP Chemistry concurrently in the fall 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 

first session on Aug 23


$399 for all live sessions, lecture notes, and problem sets in 2025-26


Detailed Introduction to L2M1 Class in 2025-26

Recording of L2M1 First Session 1in 2024-25

Signup NOW!

Module 1 (Level 3)

Module 1 (Level 2)

Module 1 (Level 2)

for students who scored 35+ in 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 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

first session on Aug 24


$449 for all live sessions, lecture notes, and problem sets in 2025-26


Detailed Introduction to L3M1 Class in 2025-26

Recording of L3M1 First Session in 2024-25

Signup NOW!

Module 1 (Level 4)

Module 1 (Level 2)

Module 1 (Level 4)

for students who scored 35+ in the 2025 National, aiming for Honor/High Honor/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 and beyond


8:30-10 PM ET on Friday

8 weekly sessions, late-Aug to mid-Oct

first session on Aug 22


$499 for all live sessions, lecture notes, and problem sets in 2025-26


Detailed Introduction to L4M1 Class in 2025-26

Recording of L4M1 First Session in 2024-25

Signup NOW!
DChO Alumni Winning at the USNCO National 2025!

Dr. Chen Coached 4 Campers, 7 High Honor, & 11 Honor in 2025

Congratulations to Alex D, Jonathan H, Hyunjun K, Vishnu M on advancing to Camp, to Jai D, Tintin D, Carson G, Philip K, Rohan V, Forest Y, Zhijia Z on winning High Honor (Top 50), and to Daniel C, Justin D, David G, Kevin H, Ayden H*, Clare L, Celina L, Margaret L, Emma L, Sanjay O, Lishan P on winning Honor (Top190)

Student testimonials about Dr. Chen’s classes

Class Materials Prepared by Dr. Chen

Copyright © 2018-2025 Decoding of Chemistry Olympiad - All Rights Reserved.

Powered by

This website uses cookies.

We use cookies to analyze website traffic and optimize your website experience. By accepting our use of cookies, your data will be aggregated with all other user data.

DeclineAccept

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!

Module 1 Class Open for Signup NOW!