Efficiency of drill is increased by distributing the drill on a given word so that practice on other words intervenes. The Test and Study Speller - Page xiv by Daniel Starch, George Alonzo Mirick - 1921 Full view - About this book
...correctly written on three consecutive trials with each trial covered before the next one is made. 37. The efficiency of drill in a given spelling period...given word so that practice on other words intervenes (1, 39). 38. There should be provision for review drill periods. In other words, spelling, as other...