diff --git a/Notes/01_Introduction/03_Numbers.md b/Notes/01_Introduction/03_Numbers.md
index 59e8d12..c83b579 100644
--- a/Notes/01_Introduction/03_Numbers.md
+++ b/Notes/01_Introduction/03_Numbers.md
@@ -45,22 +45,22 @@ e = 0b10001111  # Binary
 
 Common operations:
 
-| | |
-| ---- | ---- |
-| + | Add |
-| - | Subtract |
-| * | Multiply |
-| / | Divide |
-| // | Floor divide |
-| % | Modulo |
-| ** | Power |
-| << | Bit shift left |
-| >> | Bit shift right |
-| & | Big-wise AND |
-| &#124; | Bit-wise OR |
-| ^ | Bit-wise XOR |
-| ~ | Bit-wise NOT |
-| abs(x) | Absolute value |
+```
+x + y      Add
+x - y      Subtract
+x * y      Multiply
+x / y      Divide
+x // y     Floor Divide
+x % y      Modulo
+x ** y     Power
+x << n     Bit shift left  
+x >> n     Bit shift right
+x & y      Bit-wise AND
+x | y      Bit-wise OR
+x ^ y      Bit-wise XOR
+~x         Bit-wise NOT
+abs(x)     Absolute value
+```
 
 ### Comparisons
 
@@ -114,16 +114,16 @@ This is **not a Python issue**, but the underlying floating point hardware on th
 
 Common Operations:
 
-| | |
-| ---- | ---- |
-| + | Add |
-| - | Subtract |
-| * | Multiply |
-| / | Divide |
-| // | Floor divide |
-| % | Modulo (remainder) |
-| ** | Power |
-| abs(x) | Absolute value |
+```
+x + y      Add
+x - y      Subtract
+x * y      Multiply
+x / y      Divide
+x // y     Floor Divide
+x % y      Modulo
+x ** y     Power
+abs(x)     Absolute Value
+```
 
 Theses are the same operators as Integers, except for the bit-wise operators.
 
diff --git a/Notes/01_Introduction/04_Strings.md b/Notes/01_Introduction/04_Strings.md
index cbd02fa..3ca818a 100644
--- a/Notes/01_Introduction/04_Strings.md
+++ b/Notes/01_Introduction/04_Strings.md
@@ -26,15 +26,14 @@ Triple quotes capture all text enclosed in multiple lines.
 
 ### String escape codes
 
-| | |
-| ---- | ---- |
-| `'\n'` | Line feed |
-| `'\r'` | Carriage return |
-| `'\t'` | Tab |
-| `'\''` | Literal single quote |
-| `'\"'` | Literal double quote |
-| `'\\'` | Backslash |
-
+```
+'\n'      Line feed
+'\r'      Carriage return
+'\t'      Tab
+'\''      Literal single quote
+'\"'      Literal double quote
+'\\'`     Literal backslash
+```
 These codes are inspired by C.
 
 ### String Representation
@@ -118,24 +117,23 @@ t = s.replace('Hello' , 'Hallo')
 
 **More string methods:**
 
-| | |
-| ---- | ---- |
-| s.endswith(suffix) | # Check if string ends with suffix |
-| s.find(t) | # First occurrence of t in s |
-| s.index(t) | # First occurrence of t in s |
-| s.isalpha() | # Check if characters are alphabetic |
-| s.isdigit() | # Check if characters are numeric |
-| s.islower() | # Check if characters are lower-case |
-| s.isupper() | # Check if characters are upper-case |
-| s.join(slist) | # Joins lists using s as delimiter |
-| s.lower() | # Convert to lower case |
-| s.replace(old,new) | # Replace text |
-| s.rfind(t) | # Search for t from end of string |
-| s.rindex(t) | # Search for t from end of string |
-| s.split([delim]) | # Split string into list of substrings |
-| s.startswith(prefix) | # Check if string starts with prefix |
-| s.strip() | # Strip leading/trailing space |
-| s.upper() | # Convert to upper case |
+```python
+s.endswith(suffix)     # Check if string ends with suffix
+s.find(t)              # First occurrence of t in s
+s.index(t)             # First occurrence of t in s
+s.isalpha()            # Check if characters are alphabetic
+s.isdigit()            # Check if characters are numeric
+s.islower()            # Check if characters are lower-case
+s.isupper()            # Check if characters are upper-case
+s.join(slist)          # Joins lists using s as delimiter
+s.lower()              # Convert to lower case
+s.replace(old,new)     # Replace text
+s.rfind(t)             # Search for t from end of string
+s.rindex(t)            # Search for t from end of string
+s.split([delim])       # Split string into list of substrings
+s.startswith(prefix)   # Check if string starts with prefix
+s.strip()              # Strip leading/trailing space
+s.upper()              # Convert to upper case
 
 ### String Mutability
 
diff --git a/_config.yml b/_config.yml
index c741881..42b0a91 100644
--- a/_config.yml
+++ b/_config.yml
@@ -1 +1 @@
-theme: jekyll-theme-slate
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+theme: 
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