As most teachers are aware, many students struggle with converting units of measure, both customary and metric. Even using the mathematics chart provided for our state test, students often perform the incorrect operation and end up dividing instead of multiplying, or visa versa.
The method described and illustrated here can eliminate that common error. In addition, those students struggling to master using the "King Henry" method to convert metric units will find the Tic-Tac-Toe method very u