Summary. 57 beginners in an informal or open‐area programme and 112 in a traditional, formal classroom in a middle class area, apparently well‐matched in perceptual, motor and cognitive skills, were followed through the primary grades. Statistical analysis of achievement data showed that the formal group from the beginning had been more proficient in reading, and later, also in mathematics. There were significant differences between matched groups (N = 43) at the fourth year on seven primary CPQ factors and the second‐order factor Anxiety vs Adjustment. Mean scores, however, with one exception (F) remained well within normal limits. Total Grade, a derived score which concerns estimation of academic success, was higher for the informal children but was predictive of achievement only for the formal group.