La historia de los sistemas numéricos: Valor posicional (The History of Number Systems: Place Value)

Born in Warsaw, Poland, on November 7, 1867, Marie Curie was forbidden to attend the male-only University of Warsaw, so she enrolled at the Sorbonne in Paris to study physics and mathematics. There she met a professor named Pierre Curie, and the two soon married, forming one of the most famous scientific partnerships in history. Together they discovered two elements and won a Nobel Prize in 1903. (Later Marie won another Nobel award for chemistry in 1911.) She died in Savoy, France, on July 4, 1934, a victim of many years of exposure to toxic radiation.

Este diario original, sin censurar, de una adolescente juda̕ afincada en la ciudad neerlandesa de Rt̤erdam, arroja una nueva luz sobre la historia de los judo̕s en la Segunda Guerra Mundial. Una peripecia vital similar a la de Ana Frank pero

Teach students the significance of the capital of the United States, Washington, DC. This Spanish-translated nonfiction book introduces readers to important buildings and monuments in Washington, DC, and helps students understand the city's importance and connection to American history. Primary source images and supporting text work together to engage young learners from cover to cover.

A flexible suite of resources providing full coverage of the Cambridge IGCSE® Spanish as a Foreign Language syllabus (0530) for first examination in 2015. With a skills-based approach and an international focus, this coursebook with audio CD promotes a deeper understanding of the Spanish language and culture. Engaging texts, images and audio enhance the activities in the coursebook and help students develop language skills. Exam-style questions and clear learning objectives encourage self-assessment and support students through the Cambridge IGCSE® Spanish as a Foreign Language course.