Aviones y otras aeronaves

Learn the history of number systems with this engaging Spanish book! This text combines mathematics and literacy skills, and uses practical, real-world examples of problem solving to teach math and language arts content. Students will learn place value while reading about the number systems of the Egyptians and Romans, and also learn important vocabulary terms like cuneiform, binary systems, roman numerals, and more! The full-color images, math charts, and practice problems make learning math easy and fun. The table of contents, glossary, and index will further understanding of math and...

A dictionary tailored for the Latin American market is an ideal supplement to the middle school curriculum and includes up-to-date definitions, example sentences, synonyms and antonyms, and more. Original.

Isa and Fer find out there's going to be a new baby in the family. Isa is delighted but Fer has mixed feelings.

Simple text encourages children to make healthy decisions, including brushing after meals, washing hands regularly, and getting regular checkups at the dentist and the doctor.