what is the highest level of mixed curling not including the world chamionships or olympics
Improvements in ice making and changes in the rules to increase scoring and promote complex strategy have increased the already high popularity of the sport in Canada , and large television audiences watch annual curling telecasts , especially the Scotties Tournament of Hearts ( the national championship for women ) , the Tim Hortons Brier ( the national championship for men ) , and the women 's and men 's world championships .