Casco Bay High School in Portland and Gray-New Gloucester High School in Gray are among four Maine secondary schools being featured at a regional conference on effective strategies to improve teaching and learning in the 21st century.

Representatives from each school, including Mt. Blue High School and Foster Technology Center, both in Farmington, were invited to give presentations at the High School Redesign in Action Conference, held Thursday and today in Nashua, N.H.

The conference was sponsored by the New England Secondary School Consortium in collaboration with the departments of education in Maine, Connecticut, New Hampshire, Rhode Island and Vermont.