Rafael quiere proteger sus juguetes de Essie, su hermanita. Para eso busca materiales en su casa para construir un muro que sea lo suficientemente alto y ancho como para que Essie no pase. ¿Pero ese muro será lo suficientemente fuerte? ¿Y qué quiere Essie realmente? Esta es una exploración divertida del espacio físico y de la geometría, la cual presenta personajes chicanos (mexicoamericanos) e incluye un glosario de palabras en español. Rafael...

"Sisters Usha and Aarti, and cousin Gloria, see different things in the stars--a Big Dipper, a Big Digger, and a Big Kite--in this introduction to geometry and spatial relationships"--

One of the most significant works on our evolutionary ancestry since Richard Leakey's paradigm-shattering Origins, The First Signs is the first-ever exploration of the little-known geometric images that accompany most cave art around the world-the first indications of symbolic meaning, intelligence, and language. Imagine yourself as a caveman or woman. The place: Europe. The time: 25,000 years ago, the last Ice Age. In reality, you live in an open-air...

"Discover how the ancient Egyptians used math to build the pyramids, explore shapes in sport, and see how nature is surrounded by numbers. Meet the mathematicians who brought numbers to life, then build a city using pi and amaze your friends with math magic by trying the at-home experiments."--

"Scale drawings, geometric drawings, cross sections of figures, angle relationships, area, surface area, volume and more."--Back cover.

"Explore the exciting possibilities that come with sewing curves in your patchwork projects. This selection of 20 beautiful projects includes curved patchwork techniques, from basic to complex. This book is essential for anyone wishing to experiment with both curved piecing and modern quilt design"--

Learn what polygons are and look for them in the world around us.