"in lesson" is correct and usable in written English.
You can use it to refer to the lesson that you are currently taking part in: I'm learning a lot of interesting things in this lesson.
Differences about the student body are revealed in language more than in lesson plans.
Since the coalition scrapped levels and overhauled exams, teachers are elbow-deep in lesson plan rewrites.
In Lesson 1 I could barely move inches; now I could almost cover the full span.
Therefore, this study examines whether participating in Lesson Study influences teachers' beliefs of self-efficacy and (adaptive) teaching behaviour.
The research has explored EFL teachers' expertise in lesson planning by investigating the planning process through focus groups and interviews.
Karin Rex includes a simple piece of advice in lesson one of her Internet search class.
Contains several Ananse stories, including the story used in Lesson Plan #1 in this unit.
IN LESSON 29 of Iraq's police training manual, entitled "Women in Law Enforcement", are some arresting details.
In Lesson 9 I managed a back float (with aquatic accessories), but I could not repeat it on this day.
