In this article, the author discusses the combined artistry of third, fourth, and fifth graders as they illuminate a formerly dark corner of their school's entry plaza with a sparkling mosaic mural. The students worked in small groups to form the letters of the alphabet on 12" x 15" (30.5 x 38 cm) panels of cement board decorated with flat-backed glass "marble gems" and vitreous glass tiles. Arranging the tiles to correspond to drawings on graph paper helped students realize that all patterns are based on underlying grids. Many math concepts relating to measurement, surface area, perimeter, and proportion were applied as the mural was created, including estimates of the number of half-inch tiles of each color needed to fill specific areas. They call the mural "Love and Joy About Letters," after the title of Ben Shahn's autobiography, since many of the students have fallen in love with the designs of letters as a small child as Shahn described in his book. The student techniques in constructing the murals and details of the production are presented. (Contains 1 resource.)