Students need to learn:
Economic Analysis of Tariffs
Partial Equilibrium and General Equilibrium
Optimum Tariff and Retaliation
Offer Curve Analysis
Non Tariff Barriers
Quotas
Voluntary Restraints
Dumping
Trade Characteristics and Problems of Developing Nations
New International Economic Order
GSP
Economic Growth Strategies 
Import Substitution versus Export Led Growth
The Stopler-Samuelson Theorem