the other two

The thing is, they are just easier.  They don't require two dozen books a week or pages upon pages of math quizzers or explanations of area and perimeter and learning half the times tables all before lunch.   Being home with my kids, with someone always quite literally underfoot, a math lesson might only be twenty minutes, a request for "quizzers" over lunch may be overruled by knock knock jokes. There remain endless math equations to solve.   Books left unread will still contain their tales.  When the words themselves can't yet be read, pretending your way along has a magic all its own.