Previous findings demonstrate peer support arrangements improve academic and social outcomes for secondary students with severe disabilities, but further research is needed to determine (a) the degree to which this practice would benefit younger students, (b) the impact on student independence, and (c) how teachers can best support paraeducator implementation. In this multiple-probe-across-participants design study, a teacher trained five paraeducators to facilitate peer support arrangements with four elementary students with multiple disabilities who were eligible for alternate assessment. We identified functional relationships between teacher training and paraeducator implementation and between peer support arrangements and peer interactions. Interactions increased to levels similar to those of peers without disabilities. Students decreased their reliance on paraeducators for classroom routines when peers provided support. These findings show that the effectiveness of peer support arrangements extends to elementary students with multiple disabilities and replicate initial evidence for a promising model of teacher-implemented training for paraeducators.