id	keyword
cana-1964	thinking
cana-1964	mathematics
cana-1964	research
cana-1964	learning
cana-1964	students
cana-1964	skills
cana-1964	analysis
cana-1964	education
cana-1964	limitations
cana-1964	problem
cana-1964	study
cana-1964	thinking skills
cana-1964	school