Dr. Chen is proud to have coached four Campers 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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  • More
    • 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
      • 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
    • Textbooks
    • IChO
    • CChO
    • Mendeleev
    • VChO
    • WUCT&BCT
    • Other Sites
  • Consultation
    • Newsletters
    • Email
    • Discord
    • WeChat 微信

Events

03/24/2025 (Mon)

DChO Open Class for USNCO National 2025

8:30 pm

-

10:00 pm ET

ZOOM (click the event details to watch the recording)

Event Details

03/24/2025 (Mon)

DChO Open Class for USNCO National 2025

Description: Dr. Chen will explain and summarize the most recent years of the National Exam Part I, focusing on the 2024 National Exam.

Time:...

Event Details

8:30 pm

-

10:00 pm ET

ZOOM (click the event details to watch the recording)

03/01/2025 (Sat)

DChO Open Class for USNCO Local 2025

8:30 pm

-

10:00 pm ET

Recording (click the event details to watch the recording

Event Details

03/01/2025 (Sat)

DChO Open Class for USNCO Local 2025

Description: Dr. Chen will discuss and summarize the most recent years of the Local Exam, focusing on the 2024 Local Exam.

Time: March 1, 202...

Event Details

8:30 pm

-

10:00 pm ET

Recording (click the event details to watch the recording

02/19/2024 (Mon, Presidents' day)

Open Class 2 for USNCO 2024

8:30 pm

-

10:00 pm EST

Recording (click the event details to watch the recording)

Event Details

02/19/2024 (Mon, Presidents' day)

Open Class 2 for USNCO 2024

Description: Dr. Chen will explain the Local 2023 Original Exam problem by problem and summarize the challenges and trends.

Time: Feb 19, 202...

Event Details

8:30 pm

-

10:00 pm EST

Recording (click the event details to watch the recording)

01/15/2024 (Mon, MLK day)

Open Class 1 for USNCO 2024

8:30 pm

-

10:00 pm EST

Recording (click the event details to watch the recording)

Event Details

01/15/2024 (Mon, MLK day)

Open Class 1 for USNCO 2024

Description: Dr. Chen will explain the Local 2023 New Exam problem by problem and summarize the challenges and trends.

Time: Jan 15, 2024 08:...

Event Details

8:30 pm

-

10:00 pm EST

Recording (click the event details to watch the recording)

04/01/2022 (Fools' Day)

Open Class for USNCO National 2022

7:30 pm

-

9:00 pm EST

registration link (click "Event Details" in the left)

Event Details

04/01/2022 (Fools' Day)

Open Class for USNCO National 2022

Description: Dr. Chen will explain the challenging problems in the USNCO National 2021 Part I, as well as summarize the trends and preparati...

Event Details

7:30 pm

-

9:00 pm EST

registration link (click "Event Details" in the left)

More Events

Recording of Open Class for USNCO 2023

Description: Dr. Chen used USNCO examples to summarize the computation and conceptual understanding of "Several Equations in the Application of Thermodynamics": Arrhenius Equation, van't Hoff Equation, Clausius-Clapeyron Equation, and Nernst Equation. [Actually, they are all related!]

Time: Feb 21, 2023 08:30 PM in Eastern Time (US and Canada) 

Level: Local Exam+

Recording of Open Classes in 2022

Open Class for Local 2022

Kahoot Practice to review Each Topic

Open Class for National 2022

Detailed Explanation to National 2021 Part I MCQs

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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