Students had the third SS. Second graders didn't have SS because they had mid-term examination.
  First graders had experiment in chemistry. They observed reactivity of the cation, and they tried to to identify the unknown cations,paying attention to the safety. They were surprised at the difference in color and reactivity of the aqueous solution. They also tried identify what kind of ion they had by learning the differences of the reactivities of the aqueous solution. By doing these work precisely, they learned that objective experimental data can be obtained.

Students separated each aqueous solution
They got used to handling pipettes
They had colorful aqueous solutions
Identification of metal ionsing