In every school year level, the number of Maths — No Problem! lessons is less than the number of days available for teaching. This is especially true in Year 1 and Year 2, because we know that in those years, children have more issues and need for support. The ability level might be a very, very wide range.
So for that reason, England’s national curriculum has fewer topics in Year 1, as you would expect. The number of lessons in Year 1 is a lot less than the number of days available for teaching so that you might be able to spend three days on two lessons, instead of one lesson a day.
To put it simply, there are buffer days.
But of course, it’s not that simple. To be successful, you’ll need to plan content carefully and deliberately — making sure you skip the right lessons without sacrificing teaching quality.