Contact Us

Castlio Address: 1020 Dingledine Road, St Charles, MO 63304
School phone: 636-851-4300
School fax: 636-851-4099

Reporting a student absence: Call 636-851-4300

Contacting a teacher:

  1. Find out the teacher's extension in the Staff Directory.
  2. Dial 636-851, followed by the extension.
  3. If the teacher is not available, leave a message on their voice mail.
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