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Las 15 B+leccionesB; magistrales que contiene este libro revolucionaron, ya en los anos sesenta, los fundamentos de la pedagogia de la musica. Por entonces, el prestigioso compositor y director de orquesta Leonard Bernstein (1918-1990) presentaba en television sus famosos B+Conciertos para jovenesB; , y explicaba de una forma amena y didactica esos conceptos y puntos considerados aburridos o dificiles en la musica (el solfeo, el contrapunto, los acordes, que es un concierto, la musica sinfonica, como suenan los diferentes instrumentos, etc.). En esta cuidada seleccion de dichos conciertos...

Presenta varios experimentos en cronometría. Para estudiantes de primaria (grados 4-6) y de secundaria (grados 7-9).

When President Thomas Jefferson bought the Louisiana Territory from cash-strapped France in 1803, he doubled the size of the United States without really knowing what he was getting. He dispatched Meriwether Lewis and William Clark and their Corps of Discovery to explore a territory that would include part or all of fifteen future states and to seek a water route to the West Coast. Westward expansion began immediately, all for the bargain price of 15 million dollars. This book richly explores this fascinating part of history.

Rhyming text and photographs follow a pumpkin patch as it grows and changes, from seeds to plants to pumpkins ready to harvest, to jack-o-lanterns and then to seeds again. Simultaneous.