Question: what was the primary way that the no child left behind act (nclb) evaluated student performance
[{'answer': 'yearly standardized tests', 'provenance': [{'wikipedia_id': '512852', 'title': 'No Child Left Behind Act', 'start_paragraph_id': 25, 'start_character': 269, 'end_paragraph_id': 25, 'end_character': 294, 'bleu_score': 1.0, 'section': 'Section::::Effects on teachers, schools, and school districts.:Increased accountability.\n'}]}, {'provenance': [{'wikipedia_id': '512852', 'title': 'No Child Left Behind Act', 'start_paragraph_id': 25, 'start_character': 0, 'end_paragraph_id': 25, 'end_character': 811, 'bleu_score': 0.984062469849008, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 158634337967439698}, 'section': 'Section::::Effects on teachers, schools, and school districts.:Increased accountability.\n'}]}]