This article would be a great close read to satisfy your principals Reading in the Content request. Your reading coach will be impressed when they see this Lexiled (1123L, 980+ words) article written to meet the grade band text complexity requirements for Common Core. If you are really sneaky, your ELA team may use this in the language arts block and support science. How's that for integration. :) The article covers the importance and mechanism behind the Global Conveyor Belt.