Objectives. To compare the effectiveness of small-group training in correct inhaler technique with self-directed Internet-based training. Design. Pharmacy students were randomly allocated to 1 of 2 groups: small-group training (n 5 123) or self-directed Internet-based training (n 5 113). Prior to intervention delivery, all participants were given a placebo Turbuhaler and product information leaflet and received inhaler technique training based on their group. Technique was assessed following training and predictors of correct inhaler technique were examined. Assessment. There was a significant improvement in the number of participants demonstrating correct technique in both groups (small group training, 12% to 63%; p , 0.05; and Internet-based training, 9% to 59%; p , 0.05) post intervention, with no significant difference between the groups in the percent change (n 5 234, p . 0.05). Increased student confidence following the intervention was a predictor for correct inhaler technique. Conclusions. Self-directed Internet-based training is as effective as small-group training in improving students' inhaler technique.