Caldecott Honor winner Grace Lin celebrates math for every kid, everywhere! Manny and his friends Olivia and Mei blow bubbles in this playful introduction to geometry. Manny's wand is a circle. Olivia's wand is a square. Mei's wand is a heart. What shape will their bubbles be? (Surprise! They're all spheres.) Storytelling Math celebrates children using math in their daily adventures as they play, build, and discover the world around them. Joyful stories and hands-on activities make it easy for kids and their grown-ups to explore everyday math together. Developed in collaboration with math experts at STEM education nonprofit TERC, under a grant from the Heising-Simons Foundation.

For thousands of years, people believed the Earth was flat. Similarly, everything we believe about hell, the devil and karma is based on centuries of dogma, illogical beliefs and foolish theories. In this book, Samael Aun Weor demonstrates how to confirm for yourself the reality of the inferior levels of life, and how to avoid them. Although modern culture laughs at the mere mention of the devil and hell while simultaneously indulging deeply in them via popular music, movies, and television, the practical reality remains completely unknown to the general public. Samael Aun Weor discusses his personal, conscious experiences of the inferior worlds and the beings who reside there. By application of ancient techniques preserved by the Gnostic tradition, anyone can confirm with certainty what exists in the subtle dimensions of nature, whether above or below. Learn the true identity of both the Devil and Lucifer, and how to harness the forces of nature in order to be propelled towards a higher way of life. Dispels centuries of beliefs and theories, while explaining the essential truths hidden in ancient symbols Provides practical steps towards acquiring your own experience of the truth Supported by solid science and authentic spiritual traditions

This new revision of a standard work gives a general but comprehensive introduction to positional astronomy. Useful for researchers as well as undergraduates.