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

Highlights of Online Prep for USNCO National and Camp 2019

Descriptive Chemistry and Reactions

Descriptive Chemistry and Reactions

Descriptive Chemistry and Reactions

the most systematic and detailed instruction on description chemistry and reaction 

Advanced Organic Chemistry

Descriptive Chemistry and Reactions

Descriptive Chemistry and Reactions

the first semester of college organic chemistry was covered

Chemical Principles and Structures

Descriptive Chemistry and Reactions

Chemical Principles and Structures

advanced thermodynamics, kinetics, equilibria, electrochemistry, solid structures, coordination chemistry, MOs, etc.

Class Recording Sample - Day 1

accompany with the lecture note

Annotated Lecture Note for Day 1

Download PDF

National Exam 2021, archived

7 two-hour online sessions for national exam is ongoing. Dr. Chen will lecture advanced topics in descriptive chemistry and reactions (core content), thermo, kinetics, structures, and organic chemistry (core content). The goal of the class is to better prepare students for national 2021. Recordings are provided!

a revised schedule of Season 3
Fun and Challenging!

Season 3 - Spring 2021, archived

Season 3 includes 6 two-hour online sessions in end-Feb to early-Mar right before the local exam. Dr. Chen will explain those challenging questions and summarize the advanced topics in each category of USNCO locals. The main goal of this season is to boost conceptual understanding and improve problem solving skills.

First Session of Season 3

Kahoot-based Practice on Descriptive Chemistry

Congratulations!

11 students from Dr.Chens' classes won awards in the national round of USNCO in 2021, including two top 20 (Campers), one top 50 (High Honors), three top 150 (Honors), and five Honorable Mentions. Many more excelled in the local exam and qualified for the national exam. Congratulations on their great achievements!

Read the Full List from ACS

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Interested in Chemistry Olympiad Classes for 25–26?

Choose the path that fits you best:

  1. Self-Study + Diagnostic
    Study Honors or AP Chemistry on your own, then take Dr. Chen’s diagnostic tests to determine fall placement. Recommended textbooks
  2. Summer Class with Dr. Chen
    Take an intensive AP Chemistry+ or Organic Chemistry Class this summer with Dr. Chen to prepare for Level 2, 3, or 4 Olympiad training in the fall.
  3. Start Now – Self-Paced
    Prefer to begin right away? Purchase recordings and materials for Level 2, 3, or 4 from 2024-25 and start learning at your own pace!

Sign up for Dr. Chen's Summer Class for AP Chemistry+ or Organic Chemistry