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Abstract.Various benchmarking studies have shown that artificial neural networks and support vector machines have a superior performance when compared to more traditional machine learning techniques. The main resistance against these newer techniques is based on their lack of interpretability: it is difficult for the human analyst to understand the motivation behind these models' decisions. Various rule extraction techniques have been proposed to overcome this opacity restriction. However, most of these extraction techniques are devised for classification and only few algorithms can deal with regression problems.In this paper, we present ITER, a new algorithm for pedagogical regression rule extraction. Based on a trained 'black box' model, ITER is able to extract human-understandable regression rules. Experiments show that the extracted model performs well in comparison with CART regression trees and various other techniques.