"Monkey Business," "Pachydern Pals" and "Roaring Good Time" are titles for a few of Hogle Zoo's two-day summer classes, for which registration is under way.

The classes, offered for elementary schoolchildren during June and July, will include instruction on elephants, giraffes, ostriches, monkeys, birds, great apes, nocturnal animals, reptiles, big cats, birds of prey, zoo food and food chains and habitats.The classes will be held in the zoo auditorium. A $15 to $20 registration fee will cover all materials and a T-shirt. Call the zoo's education office, 583-2400, Monday, Wednesday and Friday between 11 a.m. and 1 p.m. for more information.