These activities are based on "pentominoes" puzzles, designed to boost problem-solving, logical and spatial thinking, and productive struggle skills in students. Pentominoes are pieces each made up of 5 squares that when combined can make many other shapes, including squares and rectangles. This is a low-floor, high ceiling activity with many possible solutions. Students can have an exciting challenge while practicing multiplication facts. Use as a center, homework, partner work, morning work,