Libro para colorear el sistema solar de los niños

Nadat twee tieners in het Texas van de jaren zeventig van de 20e eeuw het lijk van een verminkt meisje hebben gevonden, komt hun leven in gevaar.

Con tres enormes problemas mentales, un hombre avanza en su vida sin saber las tragedias de las que él mismo se impresionará. No todos los caminos son felicidad y paz. En esta tragedia insólita, navegarás por los oscuros senderos de una mente enferma.

Before there was the U.S. Constitution, there were the Articles of Confederation. Readers discover the story behind the first written constitution of the United States—from the factors that inspired its creation to the reasons why it was replaced. The detailed main text is enhanced by informative sidebars and graphic organizers. Historical images, including relevant primary sources, allow readers to immerse themselves in this historical period. Readers are given the chance to thoroughly examine elements of the original document, making them feel like true historians. They’re sure to enjoy ...

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