But the Swedish super group ABBA didn’t write “Mamma Mia!” thinking about this eventual ... opening there in 1999), was devised to fit the hits, which, for the most part, it does.

With performances March 21-29, the Los Gatos High School cast of “Mamma Mia!” is hard at work, pouring hours into refining and rehearsing the musical. Students began the production with ...