In the book Twelve Ways to get to Eleven by Eve Merriam we count up, but one number is missing. It's the number eleven. Where is it? After looking all over, from a magician's hat to a mailbox to a jack-o'-lantern, the search for the number becomes a unique and fun adventure.
January 10, 2018
Long before young children are writing equations with the equal sign, they are exploring how amounts that look different can actually be equivalent.