Agreeing with my3boys here, this early in the game I would think it would be best for you to insist that she be able to teach you *with the blocks* before allowing her to do the worksheets without the blocks. or before moving on to the next lesson.
Usually with the easier problems like the +1 set she is working with now, just a couple days of focused attention is all that is needed to tighten up her response time. And it is a very foundational, I would want to see almost instant recall here, but like thepinkballerina said, she’ll probably also need continual review even after you move on.
Jenn