Students appreciate being given lecture notes with blank spaces to be filled in during the lecture. On the one hand, this means that they can concentrate on the lecture without having to copy everything from the board. On the other hand, students have to engage with the (carefully chosen) material when filling in the blanks. (In addition, lecture attendance doesn't suffer as it sometimes does when all of the material is available in printed form.)
Other lecturers similarly put numbered "daggers" in the text of their notes where the lecture will contain more material than is in the notes: students cross-reference these daggers to their handwritten notes.