The fourth graders have made some shocking discoveries in science using batteries and circuits. Other units include rocks and minerals and ecology. Within their yearly study of Maryland, they have done Native American projects, learned about the counties, and our national capital, Washington, D.C. The culminating activity for Maryland history is the annual overnight trip to historic St. Mary's City. In math, the students work on equivalent and common fractions, decimals, measurement, problem solving, and whole numbers.