Another factor why printable questions and answers are so useful comes from the reality that you can make as many copies as you require for your class tasks. There are some situations where it would be more practical (and for that reason cost-efficient) to just provide the students one set of answers rather than an entire book or lesson.
Utilizing group work in the classroom can be a great way to make classroom interaction more memorable and meaningful. Sometimes it’s simpler to ask questions to a larger group rather than whittle your answers down to a handful.
Image source: yearnows.blogspot.com