The national Norwegian school reform of 1994, which gave students statutory rights to at least 3 years of upper secondary education, had a significant impact on educational attainment among immigrant youth. In particular, we find that the immigrant transition rate from compulsory schooling to completion of the first year of upper secondary education improved significantly from the pre- to the post-reform period. We present evidence suggesting that this improvement can be attributed to a reduction in school capacity constraints rather than to cohort heterogeneity. An important implication is that nontargeted educational reforms can have large effects on the educational attainment of disadvantaged groups in general and ethnic minority youth in particular. (Contains 13 tables.)