Hansen 
Materia derretida [PDF ebook] 
Melting Matter

A kind king in a far off land has been hiding his ears from everyone in his kingdom – even his wife, the queen! He has horse’s ears on his head and he is afraid everyone will laugh if they find out.. …

Head outside and look up. What do you see? At night you might see stars, the moon, the Milky Way, and planets! During the day all these things will still be there, but they’ll be hidden by the bright …

Want to know a secret? Regardless of what classroom challenges, standards or initiatives you’re faced with from year to year, there are seven keys to great teaching that never change—and that are oft …

Have you ever noticed that the physical world works in certain ways? Skateboarders use force and motion to perform tricks. If you jump up as high as you can, you”ll quickly fall back to the ground. …

The ‘Mission Spelling’ series teaches children to spell using phonics, with the help of a lovable little alien, called Zoggy, who has come all the way from planet Zen, three million light years away. …

Welcome to the wonderful and wacky world of Words, Werds, W-oh-er-dz! A fun and creative look at some of the funny, tricky, and interesting words we use every day. Words that sound the same but are s …