Maths ratio Purpose To determine the relative time spent on maths classes compared with all other classes. Variables Wave/ Variable Variable Year name type Variable label Question 1/2003 PCMATH Num Ratio of Maths NA Values Wave/ Variable Year name Values Values label 1/2003 PCMATH 997 N/A 998 Invalid 999 Missing Base Population Wave/ Variable Year name Base population 1/2003 PCMATH Total respondents Notes The PISA 2003 index of relative instructional time on mathematics (PCMATH) is calculated by dividing the instructional time in minutes on mathematics by the overall instructional time in minutes.
Maths ratio Purpose To determine the relative time spent on maths classes compared with all other classes. Variables Wave/ Year Variable name Variable type Variable label Question 1/2003 PCMATH Num Ratio of Maths NA Values Wave/ Year Variable name Values Values label 1/2003 PCMATH 997 N/A 998 Invalid 999 Missing Base Population Wave/ Year Variable name Base population 1/2003 PCMATH Total respondents Notes The PISA 2003 index of relative instructional time on mathematics (PCMATH) is calculated by dividing the instructional time in minutes on mathematics by the overall instructional time in minutes.