The purposes of this research were to: 1) develop a guidance activity package to support analytical thinking ability, 2) compare the analytical thinking ability both before and after using the guidance activity package to support analytical thinking ability, and 3) study the students’ attitudes towards the guidance activity package to support analytical thinking ability.
The sample used in this research was a group of 30 secondary grade 1 students from one classroom at Benchamarachuthit School, Chanthaburi Province in the academic year 2020, and was selected by cluster sampling. The research instruments included: 1) the guidance activity package to support analytical thinking ability, 2) analytical thinking ability tests for both before and after using the guidance activity package to support analytical thinking ability, and 3) an evaluation form about students’ attitudes towards the guidance activity package to support analytical
thinking ability.