CONCORD — Over the past decade, New Hampshire school districts have left unspent more than $10 million in federal aid for special education, at a time when many school administrators complain that the crushing costs of special needs programs are challenging local budgets.

LITCHFIELD — With several school districts throughout the state implementing full-day kindergarten this year, educators say they are stunned by the increased enrollment numbers and are quickly realizing the need to keep class sizes small.