diff --git a/en/src/formatted-output/debug-display.md b/en/src/formatted-output/debug-display.md
index 34e98f1..686dfc9 100644
--- a/en/src/formatted-output/debug-display.md
+++ b/en/src/formatted-output/debug-display.md
@@ -4,7 +4,7 @@ All types which want to be printable must implement the `std::fmt` formatting tr
 Automatic implementations are only provided for types such as in the `std` library. All others have to be manually implemented.
 
 ## Debug
-The implementation of `Debug` is very straightfoward: All types can `derive` the `std::fmt::Debug` implementation. This is not true for `std::fmt::Display` which must be manually implemented.
+The implementation of `Debug` is very straightforward: All types can `derive` the `std::fmt::Debug` implementation. This is not true for `std::fmt::Display` which must be manually implemented.
 
 `{:?}` must be used to print out the type which has implemented the `Debug` trait.
 
@@ -77,7 +77,7 @@ Yeah, `Debug` is simple and easy to use. But sometimes we want to customize the
 
 Unlike `Debug`, there is no way to derive the implementation of the `Display` trait, we have to manually implement it.
 
-Another thing to note: the placefolder for `Display` is `{}` not `{:?}`.
+Another thing to note: the placeholder for `Display` is `{}` not `{:?}`.
 
 4. 🌟🌟
 ```rust,editable
diff --git a/en/src/functional-programing/closure.md b/en/src/functional-programing/closure.md
index cc1e0ce..f0c8f9f 100644
--- a/en/src/functional-programing/closure.md
+++ b/en/src/functional-programing/closure.md
@@ -348,8 +348,8 @@ Returning a closure is much harder than you may have thought of.
 10. 🌟🌟
 
 ```rust,editable
-/* Fill in the blank using two aproaches,
- and fix the errror */
+/* Fill in the blank using two approaches,
+ and fix the error */
 fn create_fn() -> __ {
     let num = 5;
 
diff --git a/solutions/functional-programing/closure.md b/solutions/functional-programing/closure.md
index fd023da..d4cc367 100644
--- a/solutions/functional-programing/closure.md
+++ b/solutions/functional-programing/closure.md
@@ -245,7 +245,7 @@ fn main() {
 10. 
 
 ```rust
-/* Fill in the blank and fix the errror */
+/* Fill in the blank and fix the error */
 // You can also use `impl FnOnce(i32) -> i32`
 fn create_fn() -> impl Fn(i32) -> i32 {
     let num = 5;
@@ -261,11 +261,11 @@ fn main() {
 ```
 
 ```rust
-/* Fill in the blank and fix the errror */
+/* Fill in the blank and fix the error */
 fn create_fn() -> Box<dyn Fn(i32) -> i32> {
     let num = 5;
 
-    // how does the following closure capture the evironment variable `num`
+    // how does the following closure capture the environment variable `num`
     // &T, &mut T, T ?
     Box::new(move |x| x + num)
 }