The phrase "old system" refers to a previous or outdated method, set of rules, or way of doing things that is no longer in use or considered effective. It implies that it has been replaced by a newer, more modern, or improved system. Full definition
Many growers are moving away from keeping livestock but this age old system of integrating crops with animals has many benefits if managed appropriately. (afsa.org.au)
Under old systems, the vast majority of teachers were rated satisfactory — even if the vast majority of students were falling behind. (hechingerreport.org)
Too often, our educational problems are simply rooted in old systems and old ways of thinking. (edutopia.org)