Evaluation of just-concluded State matriculation examination papers began at 67 valuation centres across the State on Tuesday. The process of evaluation would continue for at least ten days and after tabulation, the results are likely to be out by April-end, sources said. According to the BSE authorities, the evaluation process went off peacefully on Tuesday. Nearly 16,000 teachers have been roped in to evaluate the papers. The State matriculation examinations, which began on February 23, ended last week.