A test battery (BALS On-line) was created to assess the development of language skills in Portuguese and Libras (Brazilian Sign Language) by deaf students via WWW. The battery consists of six tests, namely: Picture Naming by Matching Written Words (PNM On-line), Picture Naming by Spelling (PNS On-line), Sign Naming by Matching Written Words (SNM On-line), Sign Naming by Spelling (SNS On-line), Word Reading Competence (WRC On-line), Receptive Sign Vocabulary (RSV On-line). The traditional paper-and-pencil versions have been standardized with a sample of 1158 deaf students. This study provides preliminary validation of three out of the six computerized battery tests with hearing children. By comparing data obtained with the computerized tests to data obtained with the paper-and-pencil tests, the study found out that they are compatible.