Update description

README.md

@@ -8,7 +8,7 @@ Resources & code snippets used for the Arduino Workshop Series
 
 ## Overview
 
-The workshop would be held over the course of 3 weeks, whereby the following topics would be covered: 
+The workshop would be held over the course of 4 weeks, whereby the following topics would be covered: 
 
 - Basics of electronics
 - Programming (Arduino & a sprinkle of C++): Syntax, Variables, and more
@@ -19,3 +19,19 @@ The workshop would be held over the course of 3 weeks, whereby the following top
 
 ## Organisation
 The repository would contain the code snippets that are used in conjunction with the workshop, where the directory would be labeled as Week 1, etc.
+
+### WK1 - WK4
+The code snippets used in week 1 to 4 are found in the respective directories.
+- WK1: LEDs (digitalWrite, analogWrite via PWM), Arduino Syntax
+- WK2: Electronics Basics + Breadboarding, Serial Monitor (Output), Button (digitalRead), Button Debouncing, AnalogRead (Potentiometer, LDR)
+- WK3: Serial Monitor (Input), Piezo Speaker, Ultrasonic Sensor
+- WK4: Servos, EEPROM Read/Write, Interrupt & Timer
+
+### WK7_practice
+This week session serves as a practice and revision for arduino. The solutions are also located int this directory.
+
+> Links:
+> - [Handout only](WK7_practice/ard_prac.md)
+> - [Handout & Solutions](https://cyaninfinite.com/ard-practice/)
+
+