Speaking from someone who has been in the preschool industry for many years, it's not true all PAP kindys have no spelling. Each PAP kindergarten is run differently, depending on the principal / management committee of the estate. So that's why the standard in every PAP kindy differs from zone to zone. Although there is the PAP headquarters to ensure the PAP kindys adhere to certain guidelines, what is done at the micro level is usually beyond the control of the HQ.
That goes the same for private kindys because there is no national curriculum for preschools in Singapore. What MOE has is just a framework or guidelines for preschool education and this framework / guidelines are interpreted very differently from kindergarten to kindergarten. Often times, the kindys have to worry more about bread and butter issues such as increasing their enrolment (no enrolment; no income for their staff) and this often translates into pleasing parents (meaning more worksheets and more spelling because this is what the majority of the parents want) rather than adhering to some framework which is not going to pay their teachers' salaries.
Agreed with you.....But since PAP aka PCF as a whole should standardise the teaching programs and fees. FYI school fees is quite a big difference among different estates which can be range from $80-$130.
That is maybe the reason why nowadays parents prefer to send their kids to pte schools instead of PAP as they learn more things .