In Small Group Teaching, the tutor recommended refreshing last week's material at the start of a lesson and gave this process a name which I have not noted down. There was also a discussion of learning by rote without understanding.
In mathematics it is very necessary you will learn the material by doing it, so learning by rote without understanding is absent (though you may not understand the deep concepts). Also, this weeks material will very likely build on last weeks, since we are building concept on concept on axiom. So refreshing last weeks material is usually a given.