Honestly, kung ayaw talaga ng bata, I'd say stop na, 50 mins for one worksheet at age 6 is too much stress para sa kanya and sa inyo, and iyakan every time is a sign it's not clicking. A few of us sa circle tried Kumon early and pulled out kasi ang kids naman nag-develop ng bad feelings towards math, which is worse than not doing it. At 6, play-based learning pa ang best nila, and if she's that resistant after 3 months, it might just not be her style, some kids thrive sa Kumon structure, but definitely hindi lahat, and that's okay!