If you are a parent and your child goes to school....

There is different types of learners and teaching something in multiple ways typically is seen as one the better ways to do it but it can be varying topics that relate to each other. Focusing on one thing too much can burn the kid out or actually overwhelm them. You method is closer to what i would want a teacher to do but adding one day then subtracting the next is percectly fine as those build on each other and are sort of the opposites after that adding dividing and multiplication is the next step. I personally would have adding and subtracting taught on same day and go over it and examples and before moving on to next step the following day have like a "quickie" quiz type thing to make sure they understand the fundamentals. Multiplication and division fundamentally once understand add and subtract wont take forever but for rote memorization of the times table that would need a few days focused on but like over time since memorization is a more time consuming endeavor. Once the fundamentals are learned then you would combine and do applications of it and thats when games and such are more use.

I guess...honestly no clue but i would think diff topics and then going back to using them would be fine. Personally i suggest you bring up your concerns to the teacher and her the reasoning. You could be missing something about the students or her plan.