Students in the Sheldon Museum’s Tlingit language come for different reasons, but the class has proved its staying power as it enters its 13th year, said Kathy Friedle, who organizes it for the museum.

“Typically attendance runs between 10 and 15 students, but it’s gone as high as 18. I think people enjoy the language and it’s a connection to the history of our valley.”

The class is held 7 to 9 p.m. Tuesdays,…