Cómo funcionan los ecosistemas

Winning the American Revolution was just the first step. After defeating Great Britain, the American colonies were united in name only. How would this independent nation be governed? During the summer of 1787, representatives went to Philadelphia to solve the problem. The result, the U.S. Constitution, created a new government, establishing the foundations of a free nation and setting a new course for history.

Forces and motion are key concepts in the elementary science curriculum. This Spanish edition of How Simple Machines Work uses simple text and full-color photographs to help ELL students understand the principles behind simple machines. Each volume includes three diagrams to enhance comprehension. The text uses authentic language and is designed to build reading skills as well as knowledge of basic science concepts.

Trabajadores de mi escuela (Workers at My School) builds critical literacy skills with this exciting Spanish-translated nonfiction reader. Engage students with fascinating content that will keep them enthralled from the first page to the last. Focusing on all the different people who work at a school, children will be introduced to different school employees. This informational text features simple phrases, exact text-to-image relationships, vivid photographs, and large font to encourage students to examine different types of school workers. Aligned with state standards, Trabajadores de mi...

Técnico electricista 14 – Curso visual y gráfico Protecciones eléctricas y tableros En esta clase analizaremos los principios de funcionamiento de los fusibles, las formas constructivas, y la operación de los interruptores termomagnéticos y diferenciales. Caracterizaremos los contactores, y explicaremos la construcción y clasificación de los tableros, veremos cómo se componen y los materiales utilizados para su construcción. Explicaremos los grados de protección IP relacionados con los tableros y mencionaremos los diversos accesorios que pueden utilizarse en tableros domiciliarios.