⚠️New Students: This online enrollment is only for students who are new to Windsor Unified School District.
⚠️Non-Windsor Residents (Interdistrict Transfers): If your interdistrict transfer application has not yet been approved, do not complete. Once your student is approved, you will be directed to complete this online enrollment.
⚠️Continuing Students: If your student is currently enrolled in a Windsor Unified school (including Transitional Kindergarten (TK ) or Kindergarten), please EXIT this form. You will complete a Summer Re-Enrollment Process when it opens prior to the start of the new school year.
⚠️If applying to Cali Calmecac Language Academy: Please follow the application process before completing this online enrollment. Click this link for details: CCLA Enrollment Page
Schools Available for Online Enrollment
Mattie Washburn Elementary School – Grades PS, TK, K, 1, 2 - See dates below
Brooks Elementary School – Grades 3, 4, 5
Windsor Middle School – Grades 6, 7, 8
Cali Calmécac Language Academy – Grades PS, TK, K, 1–8 - OPENS April 2026
Windsor High School – Grades 9–12
Big Picture Learning – Grades 9–12
Sonoma County Virtual Academy (SoCoVA) – Grades 6–12
About Aeries Online Enrollment
Aeries Online Enrollment allows families to begin the student registration process online. You will enter information such as:
Once completed, your information is sent electronically to the school.
🔁 You may log out and return later if needed.
Enrollment for the 2026–2027 School Year
Key Dates
Mattie Washburn Elementary (For New TK & Kindergarten):
Online pre-enrollment opens Wednesday, February 25, 2026 and remains open indefinitely.
Mattie Washburn Elementary (For New 1st and 2nd Grade):
Online pre-enrollment opens Wednesday, January 7, 2026 and remains open indefinitely.
Cali Calmécac Language Academy:
Online pre-enrollment opens Wednesday, April 2, 2026 and closes Tuesday, April 14, 2026.
All other schools - 3rd - 12th grades
Online pre-enrollment opens Wednesday, January 7, 2026 and remains open indefinitely.
⚠️ Submitting an online enrollment form for Cali Calmécac does not guarantee admission. Families of accepted students will be contacted and directed to complete the online enrollment..
Age Requirements
Kindergarten: Child must turn 5 years old on or before September 1, 2026.
Transitional Kindergarten (TK): Child must turn 4 years old on or before September 1, 2026.
🔔 Important TK/Pre-K Note:
After you type in your child’s birthday, ‘Preschool' may auto-populate. You must manually change this to Pre-K or TK using the dropdown menu.
Failure to do so will prevent you from selecting Mattie Washburn or Cali Calmécac later in the enrollment process.
Required Documents (Upload or Bring to School)
You will be prompted to upload the following documents:
Birth Certificate (or other acceptable proof of age/identity)
Two (2) Proofs of Residency, such as:
Utility bill (water, gas, electric — cell phone bills are not accepted)
Mortgage statement or property tax receipt
Rental/lease agreement or payment receipt
Pay stub
Voter registration
Government correspondence
Most recent Immunization Record
If you are unable to upload documents, you may provide them at the school office.
Starting Enrollment
💻 Browser Recommendation: Google Chrome Google Chrome Download (ensure your browser is up to date).
About Cali Calmécac Language Academy (PS/TK/K)
Enrollment Window: April 2–14, 2026
There are four required steps. Visit this website for complete details: https://www.ccla.wusd.org/32281_2
📌 STEP 1: Attend the Parent Informational Night
📌 STEP 2: Complete the Pre-Enrollment
📌 STEP 3: If your child is admitted to Cali, you will receive a Welcome Letter with instructions for the next step—creating and completing your student’s registration in the WUSD Aeries Portal.
📌 STEP 4: Submit all required paperwork in person
(Yes… even if you’ve already uploaded it twice!)
📍 Documents may also be dropped off at:
📞 Assistance with copies: (707) 837-7747
🕗 Hours: 8:00 a.m. – 3:00 p.m., Monday–Friday
Required Paperwork:
Mattie Washburn Elementary (New PK/TK/K students)
Enrollment opens February 25, 2026.
New 1st and 2nd Grade students may complete the online enrollment starting January 7, 2026.
Required to Complete Enrollment:
📌 Enrollment is not complete until all required documents are submitted.
Required Before the First Day of School (Not at Enrollment):
Students experiencing homelessness, foster care, or migration may qualify for immediate enrollment without documents. Eligibility must be confirmed with school staff.
📞 School Office: (707) 837-7727
Big Picture Learning (BPL)
Students apply and may be invited to interview.
Admission decisions are communicated directly.
Once accepted, enrollment is completed in Aeries.
Proof of residency or an approved interdistrict transfer is required.
📞 (707) 837-7771
Sonoma County Virtual Academy (SoCoVA)
Rolling enrollment each quarter
Enrollment completed in Aeries
Interdistrict transfer agreement is required for students outside Windsor. Visit this web page for Interdistrict Transfer requirements: Interdistrict Information
Complete this interest form: SoCoVA Application and Enrollment Process
📞 (707) 837-7771
Need Help?
For enrollment questions, please contact the appropriate school office during regular business hours. Check the district website calendar for closures.