A trowel (/ˈtraʊ.əl/), in the hands of an archaeologist, is like a trusty sidekick – a tiny, yet mighty, instrument that uncovers ancient secrets, one well-placed scoop at a time. It’s the Sherlock Holmes of the excavation site, revealing clues about the past with every delicate swipe. More than a century ago, classrooms in the Philippines became extensions of colonial policy. In 1899, as the Philippine-American War unfolded, the American coloni…