Wicked Local PLYMOUTH – In a normal year, Alex Cardoso would be leading a group of excited kids on the trip of a lifetime this week. The Plymouth North High School math teacher has led student trips to Costa Rica, Iceland, Ecuador and the Galapagos Islands in recent years and, this week, he should be in Peru for a week-long adventure capped by a visit to Machu Picchu. That train trip through the Sacred Valley to the fabled Lost City of the Inca went the way of last year’s scrubbed trip to Belize, however, for Cardoso and dozens of students.