The Ormewood School classes serve children between the ages of one year and five years old. Classes are generally organized into One year-olds, Younger 2s, Older 2s, Younger 3s, Older 3s, and Pre-Kindergarten.
The school maintains small class sizes to ensure maximum attention is paid to each child. Student-to-teacher ratios are maintained as follows:
- 4:1 for the one-year-old classes
- 5:1 for the younger two-year-old classes
- 6:1 for the older 2s, younger 3s, and older 3s classes
- 7:1 for the pre-K classes