What private sector publishing firms originally set their sights on was the huge primary school textbook market, which consists of over 300,000 student readers. This, plus the possibility of publishing additional reference materials and teaching aids, adds up to potentially enormous profits. It is the main reason publishers were initially jumping at the chance to get in on the textbook market.
當初，民間的出版商看準的是教科書每一年級約有三十餘萬學生使用的這塊大餅，加上可能伴隨而來的各類參考書、教具的銷售，利潤將更可觀，這是許多出版商躍躍欲試的主因。