STOCKTON — What may look like brand new toys and games, Sysouphanh Nhongvongsouthy’s first-graders are being prepped for careers that haven’t been invented yet.Students were surprised Monday in their classroom at Rio Calaveras Elementary with a special delivery of $1,000 worth of STEM-related supplies courtesy of Chevron.There were Lego scenery sets, jumbo magnifiers, a butterfly garden, puzzles, and other educational tools that gave way to cheers [...]