According to the national curriculum , there are 30 basic competencies in grade XI (third and fourth basic competency). Through the indirect teaching, the first and second basic competency will be reached. There are 11 topics in grade XI  : Hydrocarbons&Crude Oil, Thermochemistry, Rates of Reactions, Chemical Equilibrium,  Acids and Bases, Ionic Equilibrium,pH of Salt Solution, Buffer Solution, Titration, Solubility Equilibrium, and Colloids.