---
title: "Week 4"
space: "Teacher's Handbook"
url: "https://portal.cs17.org/teachers-handbook/q1/w4"
updated: "2026-06-19"
---

## Day 1

- Started with Data representation
  - Unary
  - Binary (base 2)
  - CS50 metaphors (bulbs)
  - ASCII
  - High level overview of how images, audio and video are stored
  - Binary worksheet given

## Day 2

- Hexadecimal
- Conversions practice

## Day 3

- GIMP

## Day 4

- Practice with flowcharts

## Day 5

`NULL`  😂