วันพุธที่ 23 สิงหาคม พ.ศ. 2560

inventors and their inventions

inventors and their inventions
Archimedes (287 BCE – c. 212 BCE) Archimedes of Syracuse was an ancient Greek mathematician, physicist, engineer, inventor, and astronomer. Amongst other things he calculated pi and developed the Archimedes screw for lifting up water from mines or wells. อ่านเพิ่มเติม

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readings from literature

readings from literature Mosaic  supplements its print issues with lesson plans developed for high school educators. Each demonstrates how ...