HappyNumbers.com® helps PK-5 teachers differentiate instruction and deepen students' conceptual understanding of math. Driven by pedagogy and supported by technology (not vice versa), it's not a set of electronic worksheets or another "all dancing, all singing" resource. Instead, we teach students to "think math": students explore the meaning behind the math, building upon simple concepts to create connections and develop deep understanding.While students are learning with Happy Numbers, Happy Numbers is learning about them. It scaffolds instruction and gives feedback based on each individual student's level and progress -- it's like having a teacher assistant for each student in the class!