Pre-K and Kindergarten programs are also known as ECE (Early Childhood Education). These range from partial day programs to full day programs.
This covers a wide gamut of possibilities. Montessori or PYP-based education (following the IB school method) sit next to more local or national-oriented curriculums. During any school search, be sure to check the school's credentials, teacher backgrounds, and the ownership of the school.
Some schools offer monthly, termly or annual payment terms, depending on your familiy's circumstances.