The Basic Oral (English) Language Screening Tool (BOLST) is the statewide assessment to screen the basic oral language skills of migrant eligible Out-of-School Youth (OSY) and to assess their growth from the beginning to the end of a period of instruction from pre- to post-testing. This assessment is also designed to be a guide to help the educator understand where to start with instruction and what skill areas need additional support, alongside the expressed needs of the student.