Catalogue de données central

Début	Fin	Cycle
2012-03-23	2012-04-11	N/A

Face-to-face [f2f]
The following actions were taken to reduce non-sampling error:
- Conducted a pilot survey
- Trained data collection staff
- Trained data processing staff

The ASLO III comprises three background questionnaires:
- student questionnaire
- teacher questionnaire
- school principal questionnaire