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

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 Thermochemistry, Kinetics, Chemical Equilibrium, Acids-Bases, Buffer and Titrations, and Solubility Equilibrium in the level beyond AP

8:30-10 PM ET on Saturday

8 weekly sessions, mid-Oct to mid-Dec

first session on Oct 18

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

Detailed Introduction to L2M2 Class in 2025-26

Recording of L2M2 First Session in 2024-25

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 Kinetics, Equilibrium, Electrochemistry and Thermodynamics in the level of National Part I Exam

8:30-10 PM ET on Sunday

8 weekly sessions, late-Oct to mid-Dec

first session on Oct 19

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

Detailed Introduction to L3M2 Class in 2025-26

Recording of L3M2 First Session in 2024-25

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

$299 for all recorded sessions, lecture notes, and problem sets in 2025-26

Detailed Introduction to L2M1 Class in 2025-26

Recording of L2M1 First Session 1in 2025-26

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

$349 for all recorded sessions, lecture notes, and problem sets in 2025-26

Detailed Introduction to L3M1 Class in 2025-26

Recording of L3M1 First Session in 2025-26