According to the Department of Education 180 is the minimum number of instructional days California requires of its public schools. The 180 days doesn`t include in-service days for teachers.
Loon, Arctic also Black-throated Loon also Black-Throated Diver Gavia arctica Found: North America (Alaska), Europe, Asia. The Arctic Loon has white underparts. Breeding has black back with white bars; black face; black sides of throat with white stripes; dark green throat.
For other uses, see Loon (disambiguation). The loons (North America) or divers (UK/Ireland) are a group of aquatic birds found in many parts of North America and northern Eurasia. All living species of loons are members of the genus Gavia, family Gaviidae and order Gaviiformes.