In the first report, dated August 1991, assessment of three language tests is reported. The tests were developed and are used as part of a Los Angeles Unified School District (California) program to teach mainstream American English (MAE) to speakers of African American Language (AAL). The tests include a writing assessment (grades 3-6) and two instruments for evaluating oral skills (grades K-6), all designed to help assess program effectiveness. Test development, including pilot testing and revision, is described and conclusions and recommendations are presented. Appended materials include directions for written test administration, writing test topics, student writing samples (with scoring), writing assessment forms, notes on pretest error patterns, directions for oral test administration (both structured task and free production), scoring sheets, and sample responses (transcribed). The second report, dated December 1992, describes test modifications made in the project's second year. First, changes in the two prototype speaking tests are discussed, including development of a new prompting format for the free production test and pilot testing and revision processes and results. Creation of new writing test prompts is then described. Appended materials include examples of the 10 features of difference between MAE and AAL being tested, test administration directions, forms, and visual prompts. (MSE)