TY - CPAPER AU - J. Piedade AU - N. Pedro TI - DIGITAL TECHNOLOGY PROFICIENCY, PRACTICES AND TRAINING NEEDS OF SCHOOL PRINCIPALS: PRELIMINARY RESULTS OF A PORTUGUESE NATIONAL STUDY T2 - International Multidisciplinary Scientific Conference on Social Sciences and Arts SGEM2014, Book 1 PY - 2014 DO - 10.5593/sgemsocial2014/B13/S3.031 PB - STEF92 Technology ER -