School Motto. Mission Statement. The mission of Rock Lake Middle School is to prepare students to become productive citizens, future leaders and lifelong learners by inspiring and empowering them to excel academically, technologically, physically, creatively and socially.
The Edo period (æ±æ¸æä»£, Edo jidai) or Tokugawa period (å¾³å·æä»£, Tokugawa jidai) , is the period between 1603 and 1868 in the history of Japan, when Japanese society was under the rule of the Tokugawa shogunate and the country's 300 regional Daimyo.he period came to an end with the Meiji Restoration on May 3, 1868, after the fall of Edo.
The Ordovician Period started at a major extinction event called the CambrianâOrdovician extinction events about 485.4 Â± 1.9 Mya (million years ago), and lasted for about 42 million years. It ended with the OrdovicianâSilurian extinction event, about 443.8 Â± 1.5 Mya (ICS, 2004) that wiped out 60% of marine genera.ife continued to flourish during the Ordovician as it did in the Cambrian, although the end of the period was marked by a significant mass extinction. Invertebrates, namely molluscs and arthropods, dominated the oceans.