Lo que el Frente Polisario esconde

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

Felicitas Guerrero fue una hermosa joven, rebelde, transgresora y pasional que se animó a enfrentar a los patriarcados salvajes del Buenos Aires colonial. Su historia pertenece al patrimonio cultural argentino. En este relato maravilloso plagado de intrigas, luchas de poder, traiciones y peleas por el corazón y el dinero de esta belleza argentina, los Guerrero, los Ocampo, los Montes de Oca, los Cueto, los Sáenz Valiente tejen una trama atrapante y magnética que se desarrolla en la capital argentina y en los Pagos del Tuyú. En el tomo II: Felicitas se ha convertido en mujer, madre y...

There are many steps in the nitrogen cycle that include difficult concepts and words: denitrification, prokaryotes, ammonia, and more. With the help of this understandable book, even struggling readers will grasp this cycle of nature. Low-level language, fact boxes, and an extended glossary provide readers with essential vocabulary explanations that allow them to further understand each step of the cycle. Full-color diagrams aid readers' comprehension as they move through the cycle from start to finish, and then around again.

Follow a day in the life of two children from different cities! This entertaining title has been translated into Spanish and encourages young readers to practice time measurement skills and early STEM themes, like reading analog and digital clocks. Familiar images and fun practice problems will have young readers thinking about how they can measure time throughout a day in their own lives!