Using a multiple case-study design, this study compares the early learning behaviours of young deaf/hard-of-hearing (d/hh) children with high/low mathematics ability (as defined by test score on the Test of Early Mathematics Ability-3). Children's simultaneous use of multiple learning behaviours was also examined as were contributing adult behaviours within adult child interaction episodes that might encourage the development of learning behaviours. Results suggest a relationship between learning behaviours, mediation in the home, and early mathematics ability. (Contains 1 note, 5 tables, and 1 figure.)