The standards are: 1  Research and evidence based. 2  Clear, understandable, and consistent. 3  Aligned with college and career expectations. 4  Based on rigorous content and the application of knowledge through higher-order thinking skills. 5  Built upon the strengths and lessons of current state standards.
Alfred coined the term Columbian exchange in 1972. The Columbian exchange started to connect the New and Old Worlds with the transmission of ideas, plants, animals, and diseases. Two worlds that had grown apart with very different organisms started to become homogeneous (Crosby, 1972).
The worst negative effect of the Columbian exchange was the disease which brought to the people of New World such as smallpox, measles, chicken pox, malaria, influenza, cholera and many others. Syphilis disease also passed to the Europeans.