It is absolutely a realistic approach, what are you talking about? Is it also not a realistic approach to eat your vegetables or perform routine exercise like walking around the block?
Without solutions at the back of the book, self-directed learners can't verify their own work. Don't cut out the less privileged learners from bettering themselves just because you have no concept of discipline.
Without solutions at the back of the book, self-directed learners can't verify their own work. Don't cut out the less privileged learners from bettering themselves just because you have no concept of discipline.