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.
These deposits usually blanket preexisting landscapes and can be centimeters to hundreds of meters thick. Loess is found over a large portion of the Earth's surface, in the central and northwestern United States, Alaska, Argentina, Europe, Russia, Central Asia, China, and New Zealand.