eng: lesson presentation
eng: unit
eng: lesson resource
eng: number of attendees
eng: group in a lesson
eng: attendance in lessons, participation in the lesson
eng: extracurricular activities
eng: extracurricular activity hours
eng: synopsis of a lesson
eng: effectiveness of a lesson
eng: evaluation of a lesson
eng: aim of a lesson, a goal of a lesson
eng: teacher of a lesson
eng: course delivery, teaching
eng: textbook, tutorial
