An evaluation of the readability of four mathematics series

The purpose of this study was to evaluate four mathematics series as to the readability scores and the reinforcement of new vocabulary words. The readability scores were calculated by using the Dale-Chall Readability Formula. The new vocabulary words introduced in the series were listed on the Worksheet for Analysis of Instructional Materials Beyond Readability Scales (Schindler, 1980). The reinforcements of the new vocabulary words were checked on the Schindler worksheet.

From these instruments of comprehensive evaluation, all texts, with the exception of the sixth grade, were seen as being written at a readability level which was more difficult than the proposed grade level. The four mathematics series also did not adequately reinforce the new vocabulary words listed in the introductory lessons. These findings point out the need for publishers as well as teachers to pay attention to the language of mathematics due to the impact which textbooks have upon the mathematics curriculum.