Test students' recall of common metric and customary units and their standard abbreviations for length, mass/weight, volume, temperature, and time. Tasks include matching unit names to abbreviations (e.g., meter → m, kilogram → kg, inch → in, pound → lb, liter → L, degree Celsius → °C), selecting appropriate units for real-world objects, and distinguishing metric versus customary systems; suitable for Grade 6–8 basic recall assessment.