Learn how one boy used algebraic thinking to earn money by opening a lemonade stand! Running a business, even a lemonade stand, can be difficult, but this charming, Spanish-translated title shows readers how algebraic thinking, number patterns, and an understanding of STEM themes can make it much easier and make a business more successful! Follow along as our trader calculates costs, income, losses, and profits. Sharp mathematical skills and innovation make for a very profitable lemonade stand! This fun, practical example encourages readers to use their mathematical skills in their daily lives.