diff --git a/09_Day_Higher_order_functions/09_day_higher_order_functions.md b/09_Day_Higher_order_functions/09_day_higher_order_functions.md
index 9aa6871..1aceba5 100644
--- a/09_Day_Higher_order_functions/09_day_higher_order_functions.md
+++ b/09_Day_Higher_order_functions/09_day_higher_order_functions.md
@@ -85,7 +85,7 @@ const higherOrder = n => {
 console.log(higherOrder(2)(3)(10))
 ```
 
-Let us see were we use call back functions. For instance the _forEach_ method uses call back.
+Let us see where we use call back functions. For instance the _forEach_ method uses call back.
 
 ```js
 const numbers = [1, 2, 3, 4, 5]
diff --git a/10_Day_Sets_and_Maps/10_day_Sets_and_Maps.md b/10_Day_Sets_and_Maps/10_day_Sets_and_Maps.md
index 25dafe9..dde1074 100644
--- a/10_Day_Sets_and_Maps/10_day_Sets_and_Maps.md
+++ b/10_Day_Sets_and_Maps/10_day_Sets_and_Maps.md
@@ -263,7 +263,7 @@ Set(3) {3, 4, 5}
 
 ### Difference of sets
 
-To find an the difference between two sets can be achieved using filter. Lets find the different of set A and set B (A \ B)
+To find an the difference between two sets can be achieved using filter. Lets find the difference of set A and set B (A \ B)
 
 ```js
 let a = [1, 2, 3, 4, 5]
diff --git a/11_Day_Destructuring_and_spreading/11_day_destructuring_and_spreading.md b/11_Day_Destructuring_and_spreading/11_day_destructuring_and_spreading.md
index d4ffc34..978a4e9 100644
--- a/11_Day_Destructuring_and_spreading/11_day_destructuring_and_spreading.md
+++ b/11_Day_Destructuring_and_spreading/11_day_destructuring_and_spreading.md
@@ -184,7 +184,7 @@ Node Express MongoDB
 
 ### Destructuring Object
 
-When we destructure the name of the variable we use to destructure should be exactly the same as the key or property of the object. See the example below.
+When we destructure the name of the variable our destructure should be exactly the same as the key or property of the object. See the example below.
 
 ```js
 const rectangle = {
diff --git a/15_Day_Classes/15_day_classes.md b/15_Day_Classes/15_day_classes.md
index be9e8db..cc6c511 100644
--- a/15_Day_Classes/15_day_classes.md
+++ b/15_Day_Classes/15_day_classes.md
@@ -72,7 +72,7 @@ We have created an Person class but it does not have any thing inside.
 
 Instantiation class means creating an object from a class. We need the keyword _new_ and we call the name of the class after the word new.
 
-Let us create a dog object from our Person class.
+Let us create a person object from our Person class.
 
 ```js
 class Person {
@@ -92,7 +92,7 @@ Let use the class constructor to pass different properties for the class.
 
 ### Class Constructor
 
-The constructor is a builtin function which allows as to create a blueprint for our object. The constructor function starts with a keyword constructor followed by a parenthesis. Inside the parenthesis we pass the properties of the object as parameter. We use the _this_ keyword to attach the constructor parameters with the class.
+The constructor is a builtin function which allows us to create a blueprint for our object. The constructor function starts with a keyword constructor followed by a parenthesis. Inside the parenthesis we pass the properties of the object as parameter. We use the _this_ keyword to attach the constructor parameters with the class.
 
 The following Person class constructor has firstName and lastName property. These properties are attached to the Person class using _this_ keyword. _This_ refers to the class itself.