In Denmark, we don't have anything called a 'preschool' before the kids start school. They more or less go straight to school from going to daycare.
The first year of school is called 'daycare-school' (børnehaveklasse) and is designed to help ease kids into school, but it's still part of the 10 years of primary school and is not related to any daycare facilities.
I noticed some countries saying 'preschool teacher' or 'kindergarten teacher'. In Denmark, the people working at daycare centers are 'Pædagoger' (couldn't find a good translation). Becoming a 'pædagog' is a completely separate education from becoming a school teacher. Are there teachers at daycares and preschools in your country?