The present paper focuses on new teachers' satisfaction with their first year of teaching from the perspective of socialization. The relationship between satisfaction with socialization and teacher background, school environment, placement, and induction variables was examined. Data were collected from 243 Israeli beginning teachers by means of questionnaire. Results indicated that satisfaction during the induction year was moderately high. Hierarchical regression analysis showed five significant predictor variables: ecological support from mentor, help from the principal, assistance from other colleagues, workload, and having already completed teaching training. Support from mentors and school colleagues had the greatest impact on new teachers' assimilation. (Contains 3 tables.)