The effects of modeling and corrective feedback on the conservation of equalities and inequalities were studied with items spanning three stimulus dimensions (length, number, and two-dimensional space). Observation of a model, correction training (joining positive feedback with verbal rule provision), and the combination of observation and correction were all successful in producing learning and, without further training, transfer and retention of conservation. Unlike the controls (who also never correctly answered any equality items), the trained experimental groups gave evidence of spontaneously generalizing their new learning to a task that required nonverbal behavior to manifest conservation. (Author)