R. baker, j. kalka, v. aleven, l. rossi, s. gowda, a. wagner, g. kusbit, m. wixon, a. salvi, j. ocumpaugh. towards sensor-free affect detection in cognitive tutor algebra. proceedings of the 5th international conference on educational data mining, 01 2012:

stewards ice box was the purchase of alaska from russia and it was called that because people thought it was not a good idea to purchase alaska

this is a pretty broad question and can be a pretty lengthy answer. since 1900, women have gained a lot more rights and have become active in the workforce. with women being in the workforce, men play a larger role in family life. many family tasks are shared between men and women, whereas, women used to be the sole family caretakers.

that should get you started at least.

its c i google it wish u luck

the correct answer is the following is a list of inventions made in the medieval islamic world, especially during the "islamic golden age" (8th to 13th centuries),[1][2] as well as the late medieval period, especially in the emirate of granada and the ottoman empire.

science and technology in the islamic world adopted and preserved knowledge and technologies from contemporary and earlier civilizations, including persia, india, china, and greece-roman antiquity, while making a number of improvements and innovations.