'half of the lesson' is a perfectly valid and usable phrase in written English.
An example sentence could be: "I only had time to get through half of the lesson before the bell rang."
The first half of the lesson, which takes us up to the moment of God's destruction of the world with Noah's flood, is presented to Adam as a vision, and Adam sees this early history unfold itself.
"Mr Turnbull's only picked up half of the lesson from the Labor party; you can only abolish taxes or reduce taxes when you've got a source of income to replace them".
The first half of the lesson required that the pupils collaborated in pairs or small groups in the drafting and redrafting of the work until each pupil and I were satisfied with the outcome.
We spent half of the lesson looking up the definition of "replica" (seriously, only three people knew what it meant).
Since the evaluator did not actually observe the first half of the lesson, they evaluated it based on my lesson plan, and responded negatively when they felt I did not specify enough about what I was going to do.
In the latter half of the lesson, participants learn a relaxation technique using a breathing method.
Duolingo previously offered this feature on its website (and they both use the same backend), but as von Ahn told me, about half of the lessons on the service are now completed on the iPhone.
The mean attendance for the 20 aerobic classes was 10.4 h, and 56% of women in the intervention group attended the aerobic classes for at least half of the lessons.
Although inspectors found progress was good or outstanding in more than half of the 470 lessons observed, they said there "weaknesses" in too many lessons - particularly in speaking, listening and reading.
If children are paired, and given a third or half of a lesson on the computer, you can get through a class quickly.
The average rating for out-of-class reading was 3.06 (SD = 0.66), indicating that students completed just over half of the assigned reading per lesson.
