The Lady Wildcats (3-2) led 9-4 after one period. Senior Emily Speakman accounted for all of Cassville's scoring in the first period.
"Emily got us going early," said Cassville coach Chris Shore. "I thought our defense did a good job for three quarters of disrupting Monett's offense.
"Monett's record is deceiving," continued Shore. "They have played some really tough teams. I don't know if we would have fared much better with their schedule."
Monett opened the second period with a 5-2 run to close the gap to 13-9, but the Lady Wildcats outscored the Lady Cubs 13-5 to end the first half with a 26-14 lead.
"Brick by brick we are trying to build our program," said Monett coach Kelly George. "Tonight, the girls added another brick to that process. I was proud of the effort and the no-quit attitude of our team."
Turnovers continued to haunt the purple and gold in the second half as Cassville built a 38-22 lead with two minutes remaining in the quarter, prompting a Monett timeout.
"I thought the girls did a good job of playing hard the entire game," said George.
Monett trailed 40-23 to start the final period and scored the next 10 points.
Faith Schmidt keyed the run with three steals that transitioned into layups. Haylee Morris supplied a pair of buckets in the paint.
Cassville's Kelsey Baker ended the Monett advance with a free throw with 2:26 left in the game.
Monett turned the ball over on its next possession and couldn't regain the momentum.
Scoring for Cassville: Speakman, 14 points; Raeghan Blisard, 12; Baker, 6; Lindsay Nolan, 5; Brooke Fields, 4; Sydney Curnes, 2; and Britani Long, 1.
Scoring for Monett: Schmidt, 10 points; Cheryl Barnes, 9; Morris, 8; Brooke McLean, 7; and Jessica Harper, 1.
Cassville hosts Crane on Dec. 17. Tipoff is scheduled for 6 p.m.