From what I've seen in Methuen I was not impressed, and there are many nicer towns in the area.
For schools Andover, North Andover and Newburyport have great schools, and are nice commuities.
Pentucket - serving Groveland, Merrimac and West Newbury - seem to have good results, 93, 90 and 86 percent proficiency in English, math and science. Amesbury is 88,86,75. Tewksbury is 86,82,70.
Methuen is 76, 58, 57, which is below state average.
MCAS Report (DISTRICT) - Massachusetts Directory Profiles