Serpientes y escaleras

What will it take to send people to Mars in the next 25 years? Students will learn that problem solving is an essential component of NASA’s planned mission to mars. This Spanish book combines mathematics and literacy skills, and uses practical, real-world examples of problem solving to teach math, language arts, and STEM content. Students will learn problem solving while engaged in reading high-interest content. The glossary, index, and table of contents will further understanding of reading and math concepts, and the full-color images, practice problems, and math graphs and charts make...

Describes jet-powered hydroplane boats, including information on their design and speed. Written in English and Spanish.

¿Por qué alguien tan inquieta como Aída puede permanecer sentada escuchando ópera? En El misterio de la ópera, sus amigos Pablo, Edu y Winnie lo comprenderán después de asistir a los ensayos de La flauta mágica en el Teatro de la Ópera, al que acudirán para resolver el misterioso caso de un anillo robado.

Many insects hatch from eggs and molt several times as they grow bigger. Others, such as butterflies, undergo a complete metamorphosis. A common science curriculum topic, insect life cycles may be confusing because of these differences. However, this book breaks down these cycles into easy-to-understand steps in both accessible language and colorful diagrams readers can turn to for review again and again. The most important vocabulary needed to talk about insect life cycles is further explained in fact boxes and an extended glossary.