All new students to Castleberry ISD must provide the following documents for registration:
- Certified copy of student's birth certificate
- Student's social security card
- Valid immunization record signed by a physician or health department showing all required immunizations
- Parent's drivers license or other photo ID
Students who have been enrolled in another school district should also provide:
- Withdrawal records from the previous district
- Report card from the previous district
All students must provide proof of residence (i.e. current water, gas, electric bill, or rental agreement) dated within the last three months.