I have been told that one of the reasons the astronomers of the world cooperate is the fact that there is no one nation from which the entire sphere of the sky can be seen. Perhaps there is in that fact a parable for national statesmen, whose political horizons are all too often limited by national horizons
by Adlai Stevenson

Thảm hoạ sách toán VNEN

Mấy bài từ cũ

http://zung.zetamu.net/2010/10/chuy%E1%BB%87n-sach-giao-khoa-m%E1%BB%99t-l%E1%BA%A7n-khong-t%E1%BB%91n-44-l%E1%BA%A7n-khong-xong/

http://zung.zetamu.net/2010/10/canh-bu%E1%BB%93m-mong-manh-sg/

http://zung.zetamu.net/2016/09/the-nao-la-mot-quyen-sach-giao-khoa-tot/

http://zung.zetamu.net/2010/10/gi%E1%BA%A3i-%E1%BA%BFch-vang-cho-b%E1%BB%99-sach-chao-l%E1%BB%9Bp-1-c%E1%BB%A7a-canh-bu%E1%BB%93m/

What is mathematics?

Toán học là gì? Bài nói chuyện cho học sinh, giáo viên và phụ huynh học sinh tại trường THCS Archimedes, 06/11/2016