diff --git a/1-js/02-first-steps/04-variables/article.md b/1-js/02-first-steps/04-variables/article.md
index 09b1172f..dda84af5 100644
--- a/1-js/02-first-steps/04-variables/article.md
+++ b/1-js/02-first-steps/04-variables/article.md
@@ -314,7 +314,7 @@ And the last note. There are some lazy programmers who, instead of declaring a n
 
 As the result, the variable is like a box where people throw different things without changing the sticker. What is inside it now? Who knows... We need to come closer and check.
 
-Such a programmer saves a little bit on variable declaration, but looses ten times more on debugging the code.
+Such a programmer saves a little bit on variable declaration, but loses ten times more on debugging the code.
 
 An extra variable is good, not evil.
 
diff --git a/1-js/02-first-steps/05-types/article.md b/1-js/02-first-steps/05-types/article.md
index 9c8cec65..c7f09efc 100644
--- a/1-js/02-first-steps/05-types/article.md
+++ b/1-js/02-first-steps/05-types/article.md
@@ -1,6 +1,6 @@
 # Data types
 
-A variable in JavaScript can contain any data. A variable can at one moment be a string and later recieve a numeric value:
+A variable in JavaScript can contain any data. A variable can at one moment be a string and later receive a numeric value:
 
 ```js
 // no error
@@ -8,7 +8,7 @@ let message = "hello";
 message = 123456;
 ```
 
-Programming languages that allow such thing are called "dynamically typed", meaning that there are data types, but variables are not bound to any of them.
+Programming languages that allow such things are called "dynamically typed", meaning that there are data types, but variables are not bound to any of them.
 
 There are 7 basic data types in JavaScript. Here we'll study the basics, and in next chapters we'll talk about each of them in detail.
 
diff --git a/1-js/02-first-steps/12-while-for/article.md b/1-js/02-first-steps/12-while-for/article.md
index 575cfa68..41ae8c08 100644
--- a/1-js/02-first-steps/12-while-for/article.md
+++ b/1-js/02-first-steps/12-while-for/article.md
@@ -82,7 +82,7 @@ do {
 } while (i < 3);
 ```
 
-This form of syntax is rarely used. Usually, if there's no special reason, the other  form is preferred: `while(…) {…}`.
+This form of syntax is rarely used except when you want the body of the loop to execute **at least once** regardless of the condition being truthy. Usually, the other  form is preferred: `while(…) {…}`.
 
 ## The "for" loop
 
diff --git a/1-js/07-object-oriented-programming/09-class/article.md b/1-js/07-object-oriented-programming/09-class/article.md
index cb1beec0..a747bede 100644
--- a/1-js/07-object-oriented-programming/09-class/article.md
+++ b/1-js/07-object-oriented-programming/09-class/article.md
@@ -114,7 +114,7 @@ class User {
 
   constructor(name) {
     // invokes the setter
-    this.name = name;
+    this._name = name;
   }
 
 *!*