Buffled parent here. My primary aged daughter could do long multiplication as I taught her at home as part of the curriculum of the distance school in my country. We stopped that this year. Of course, as we never get any homework or get to see the books from primary school I had not idea of what they were learning (that's a different story), but due to the current circumstances, she is getting work from school. Imagine my face, I am an old parent... so the grid method looked like out of Mars for me. She explained it to me and I get it, she gets it, and says it's easier. I just don't understand how it is a good idea to regress to the grid method, when you can already do the long multiplication method. Also, what do you do in secondary school, would you expect your students to use long multiplication or you are okay with them spending lots of paper and time doing infinite grids? By the way, I am MFL not Maths.