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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
lesson in which
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "lesson in which" is correct and usable in written English.
It can be used to describe a specific lesson that includes a particular topic or activity. Example: "In the lesson in which we discussed the importance of teamwork, students participated in group activities."
✓ Grammatically correct
News & Media
Science
Formal & Business
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
40 human-written examples
The math lesson in which children are urged to count computer mice?
News & Media
On June 22nd one group of youngsters conducted a spontaneous "economics lesson" in which terms such as "credit event" and "haircut" were explained and deconstructed.
News & Media
This was made clear by the day's lesson, in which class members took turns talking about what their parents had done for a living.
News & Media
You can see that in one of his best-known paintings, "The Banjo Lesson," in which an elderly man instructs a boy who sits in his lap.
News & Media
Ideas include a music lesson in which students create a soundscape about a journey and an art lesson that focuses on personal identity.
News & Media
Rhiannon Rees, also a newly-qualified teacher, recalls a maths lesson in which physical activities and a hot classroom threw her plans into disarray.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
19 human-written examples
This lesson comes at the end of a sequence of lessons in which we have been learning about free time activities and daily routine.
News & Media
"Magic Lessons," in which Gilbert provides "road maps for the path to creativity," begins with a few strains of a feisty Old World tune.
News & Media
Merlin's tutelage consists of lessons in which young Arthur becomes a series of other animals – birds, ants, fish – in order to learn about ethics and politics.
News & Media
Has previously taught science, maths, geography and French State school teachers I know are teaching 23 lessons out of 25 possible periods a week – so they have two lessons in which to do all their marking, all their planning.
News & Media
But to ensure standards across the board, he gave every staff member a "planning for learning" pack to help create "effective lessons in which pupils' learning and engagement are maximised".
News & Media
Expert writing Tips
Best practice
When precision is key, opt for "lesson in which" to link the activity directly to the learning objective. This ensures that the relationship between the lesson and its content is clearly defined.
Common error
Avoid using "lesson in which" in very informal settings. Simpler alternatives like "the lesson that..." or "the lesson about..." are often more appropriate and sound less stilted.
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "lesson in which" functions as a relative clause, modifying the noun "lesson". It provides additional information about the specific content, activity, or focus of that lesson. The examples provided by Ludwig show how it's used to specify what happens during the lesson.
Frequent in
News & Media
62%
Science
24%
Formal & Business
8%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "lesson in which" is a grammatically correct and frequently used phrase employed to specify the content or activities of a lesson. According to Ludwig, the phrase is accepted and understandable in written English, particularly in contexts such as news, science and formal business communications. While versatile, it's best to avoid it in informal conversations, opting for simpler alternatives. It serves to add clarity and specificity, enhancing the reader's understanding of the lesson's particular focus.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
class where
Changes the prepositional phrase to a simpler adverbial clause using "where".
session during which
Replaces "lesson" with "session" and maintains the relative clause structure.
lecture in which
Substitutes "lesson" with "lecture", suitable when the context involves a more formal educational setting.
tutorial where
Replaces "lesson" with "tutorial" and "in which" with "where", implying a more hands-on learning environment.
period when
Uses "period" instead of "lesson" and "when" to replace "in which", focusing on a segment of time.
time when
Replaces "lesson" with "time" and "in which" with "when", broadening the context beyond just educational settings.
case in which
Shifts the focus from a lesson to a more general "case", changing the connotation.
instance where
Similar to "case in which", but emphasizes a specific occurrence or example.
situation in which
Describes a broader scenario rather than specifically a lesson.
event during which
Changes "lesson" to "event", broadening the context beyond education.
FAQs
How can I use "lesson in which" in a sentence?
You can use "lesson in which" to describe a specific class or educational session that includes a particular topic or activity. For example, "The math "lesson in which" children are urged to count computer mice".
What are some alternatives to "lesson in which"?
Alternatives include "class that covers", "session focusing on", or "lecture where". The best choice depends on the specific context and desired level of formality.
Is "lesson in which" formal or informal?
"Lesson in which" is generally considered neutral to slightly formal. In very informal contexts, simpler phrases might be more suitable.
How does "lesson in which" differ from "lesson that"?
"Lesson in which" typically introduces a more detailed description or specific activity integrated into the lesson. "Lesson that" is a more general construction. For example, "a "lesson in which" students create a soundscape" is more specific than "a lesson that teaches about soundscapes".
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested