گزینههای پاسخ: SE:Inapplicable ; RU:Inappropriate response; BH: Missing{Ina, Not asked in survey, Not applicable, No answer, Don´t know, Often, Sometimes, Rarely, Never
گزینههای پاسخ: Never or almost never, Some lessons, Many lessons, Every lesson or almost every lesson, Valid Skip, Not Applicable, Invalid, No Response
