Reveal one line at a time in Powerpoint presentations. Wait for the students to copy it (if they are doing that) before revealing the next line.
Give them thinking time – don’t fill all the silences with speaking.
At the end of each slide ask students to put their hand up if they’re still writing and wait without speaking until they’ve all finished.
Not talking when they are trying to read/copy and giving them time to think gives them the best chance of following and thinking about the information. It also generally results in a lot more questions from students (as more are following the material), often from students who wouldn’t usually be able to keep up. As it encourages a lot more engagement from a new set of students it makes the lectures more inclusive.