Computer Assisted Screening Tool (CAST) gauges oral proficiency of students in various languages. It allows test takers to take an on-line oral interview consisting of automated audio and visual elicitation prompts. Once the test has been taken, it is evaluated by a person who is an expert in the language in which the test has been taken. After evaluation test takers receive results indicating whether or not they achieved advance level with feedback on which areas need to be improved. The Rater Notification System for CAST enhances the functionalities of the existing rating process. This system sends notification by email to the raters when the test taker completes his test. It implements a locking/unlocking mechanism to prevent multiple raters from evaluating the same test at the same time, by restricting the rating process to only one rater and unlocks it on different circumstances like browser closing, session timeout, user navigation to a different page and logout. It provides a timer to count the time for the rating process and notifies the rater when the timer is about to expire, with an option to extend the timer.