This study compared children's Spanish reading performance across 2 reading intervention conditions: small group versus individual (teacher-student). Six second-grade Costa Rican students with low Spanish reading ability participated in the study. An alternating-treatments design was used to compare the relative effectiveness of the 2 interventions to each other and to a no-intervention control condition. Results showed that nearly all students benefitted from 1 or both of the reading interventions. Findings are consistent with previous research with English readers and suggest that delivering fluency-based reading interventions with fidelity (such as those described in the current study) to Spanish readers may be an effective way to improve Spanish-speaking students' reading skills. Results are also consistent with past research on the comparable effectiveness of delivering a reading-fluency intervention to a small group versus an individual. Implications of these findings are discussed in terms of relative efficiency in the delivery of reading-fluency interventions, and with respect to educators in and out of the United States who work with students struggling with Spanish-reading fluency.