(a) All children entering public school for the first time in this state shall be given prior to their enrollments screening tests to determine if they might have vision or hearing impairments or speech and language disabilities. County boards of education may provide, upon request, such screening tests to all children entering nonpublic school. County boards of education shall conduct these screening tests for all children through the use of trained personnel. Parents or guardians of children who are found to have vision or hearing impairments or speech and language disabilities shall be notified of the results of these tests and advised that further diagnosis and treatment of the impairments or disabilities by qualified professional personnel is recommended.