Reported are the results and conclusions of an arithmetic investigation made in the schools of Scotland in the spring and fall of 1966. The first problem in this investigation was to ascertain which, if either, of two unlike programs of instruction was more effective in developing skill in computation. The second was to determine the value of an…

The purpose of this study was two-fold: (1) to investigate the effects of a new approach for teaching decimals by comparing it with two other commonly used methods with respect to achievement and retention of computational ability in decimals, and (2) to determine those areas of the new approach which seemed to be in need of revision. The study…