WHATELY — When Jonathan Edwards’ fifth-grade daughter returned from a field trip to Boston several years ago, her review disappointed her father, a lifelong history buff. After hearing about guided tours, headphones and “looking at a building around a bunch of other tall buildings,” Edwards came away with a different conclusion. “Oh, we’re using 20th-century technology to deliver 21st-century content to 21st-century … students or adults,” Edwards remembers thinking.