More than a dozen school groups filled Hadlock Field during the Portland Sea Dogs’ Education Day game Thursday morning in Portland. Hadlock Field was loud before the first pitch. By 10:00 in the morning, school buses lined the streets outside the ballpark. Students poured through the gates in waves, teachers counting heads while volunteers pointed groups toward the concourse. Inside, the smell of popcorn and grilled hot dogs drifted through the cool spring air as players stre