These mistakes when dealt at the right time of progress doesn’t build up to more complex issues later in academic years. Yes, the time, pace and strategy for each difficulty and each child may vary. A regular assessment to keep track of progress made, if not to find other techniques to make clear those points or using other learning methods that may suit or connect better to the child. This requires continuous dedication and regular assessment by using formative assessment be part of their regular learning to check for their understanding.