diff --git a/concepts/basics/introduction.md b/concepts/basics/introduction.md
index 0e1fd62da2..a54e1c1e84 100644
--- a/concepts/basics/introduction.md
+++ b/concepts/basics/introduction.md
@@ -21,7 +21,7 @@ In contrast to `let` and `var`, variables that are defined with `const` can only
 ```javascript
 const MY_FIRST_CONSTANT = 10;
 
-// Can not be re-assigned.
+// Cannot be re-assigned.
 MY_FIRST_CONSTANT = 20;
 // => TypeError: Assignment to constant variable.
 ```
diff --git a/concepts/errors/introduction.md b/concepts/errors/introduction.md
index 138afd6610..39fcd13cd9 100644
--- a/concepts/errors/introduction.md
+++ b/concepts/errors/introduction.md
@@ -2,7 +2,7 @@
 
 Errors are useful to report when something is wrong or unexpected in a program or a piece of code.
 
-They are javascript objects.
+They are JavaScript objects.
 
 The main property of this object is `message`:
 
diff --git a/concepts/numbers/about.md b/concepts/numbers/about.md
index cefa271b7b..b9d13b5d75 100644
--- a/concepts/numbers/about.md
+++ b/concepts/numbers/about.md
@@ -26,7 +26,7 @@ Numbers may also be expressed in literal forms like `0b101`, `0o13`, `0x0A`. Lea
 ### Exponential Notation
 
 The E-notation indicates a number that should be multiplied by 10 raised to a given power.
-The format of E-notation is to have a number, followed by `e` or `E`, than by the power of 10 to multiply by.
+The format of E-notation is to have a number, followed by `e` or `E`, then by the power of 10 to multiply by.
 
 ```javascript
 const num = 3.125e7;
@@ -37,7 +37,7 @@ const num = 3.125e7;
 E-notation can also be used to represent very small numbers:
 
 ```javascript
-const num = 325987e-6; // Equals to 0. 325987
+const num = 325987e-6; // Equals 0.325987
 // The notation essentially says, "Take 325987 and multiply it by 10^-6.
 ```
 
@@ -153,7 +153,7 @@ isFinite(NaN); // => false
 
 `+0` or `-0` are distinct numbers in JavaScript. They can be produced if you represented a number, that is so small that it is indistinguishable from 0.
 The signed zero allows you to record “from which direction” you approached zero; that is, what sign the number had before it was considered zero.
-It is best practise to pretend there's only one zero.
+It is best practice to pretend there's only one zero.
 
 ## Comparison
 
diff --git a/concepts/promises/introduction.md b/concepts/promises/introduction.md
index f077711929..3b1440a5d8 100644
--- a/concepts/promises/introduction.md
+++ b/concepts/promises/introduction.md
@@ -4,7 +4,7 @@ The [`Promise`][promise-docs] object represents the eventual completion (or fail
 
 <!-- prettier-ignore -->
 ~~~exercism/note
-This is a hard topic for many people, specially if you know programming in a language that is completely _synchronous_.
+This is a hard topic for many people, especially if you know programming in a language that is completely _synchronous_.
 If you feel overwhelmed, or you would like to learn more about **concurrency** and **parallelism**, [watch (via go.dev)][talk-blog] or [watch directly via vimeo][talk-video] and [read the slides][talk-slides] of the brilliant talk "Concurrency is not parallelism".
 
 [talk-slides]: https://go.dev/talks/2012/waza.slide#1
diff --git a/concepts/template-strings/introduction.md b/concepts/template-strings/introduction.md
index 396c8d8f18..6af7f9cbc7 100644
--- a/concepts/template-strings/introduction.md
+++ b/concepts/template-strings/introduction.md
@@ -1,6 +1,6 @@
 # Introduction
 
-In JavaScript, _template strings_ allows for embedding expressions in strings, also referred to as string interpolation.
+In JavaScript, _template strings_ allow for embedding expressions in strings, also referred to as string interpolation.
 This functionality extends the functionality of the built-in [`String`][string-reference] global object.
 
 You can create template strings in JavaScript by wrapping text in backticks.
diff --git a/exercises/concept/factory-sensors/.docs/instructions.md b/exercises/concept/factory-sensors/.docs/instructions.md
index 545c242b4e..ccee09cce3 100644
--- a/exercises/concept/factory-sensors/.docs/instructions.md
+++ b/exercises/concept/factory-sensors/.docs/instructions.md
@@ -61,7 +61,7 @@ Now that your machine can detect errors, you will implement a function that reac
 - If the temperature is too high, you will either shut down the machine if the temperature exceeds 600°C or turn on a warning light if it is less than that.
 - If another error happens, you'll rethrow it.
 
-Implements a function `monitorTheMachine` that takes an argument `actions`.
+Implement a function `monitorTheMachine` that takes an argument `actions`.
 
 `actions` is an object that has 4 properties :