Metric is easier for children to learn.
Imperial is generally a finer and therefore more accurate measurement.
If you're not completely dim, you will have no trouble learning the Imperial system
I am a european and I learned that even the US goes metric in sience fields, such as NASA. Also, american students are taught metric units in math and sience classes but still use imperial ones in daily life.
USE METRIC SYSTEM SO IT'S EASY TO CALCULATE MEASUREMENTS; UNITED STATES; USE IMPERIAL SYSTEM SO STUDENTS HAVE TO LEARN A BUNCH OF CRAP WHICH MAKES NO SENSE, AND ALSO MAKE IT HARD TO CALCULATE MEASUREMENTS; UNITED STATES