In the 19th and early 20th centuries, one room schoolhouses were the norm in rural areas. A single teacher taught grades one through eight<span> together. The youngest students—called Abecedarians, because they would learn their </span>ABCs<span>—sat in the front, while the oldest sat in the back. The room was heated by a single wood stove.</span>
Ok so let me explain this. <span>In the library of congress system of classifying books, every book receives a classification number that starts with 1-3 letters. Those letters give you a general idea of topic.</span><span> The "Teaching New Math" book It's in the Q's for sciences, and more specifically QA's under math. So the answer you will be looking for is QA. Hope this can help you</span>
<span>Speciation because it is the formation of new </span>species<span> as a result of geographic, physiological, anatomical, or behavioral factors that prevent previously interbreeding populations from breeding with each other. Hope this helps! </span>
Jetstream hope this helps out
