🤑 Join the Treehouse affiliate program and earn 25% commission!

🌟 Dreaming of a bright future? 🎓 Ask about the Treehouse Scholarship program! 🚀

Curious which AI tools Treehouse developers love? ⚙️ Check them out!

🫡 Treehouse for Military offers discounts to Veterans, service members and their families!

Karen de Graaf

Member Since February 2, 2014

Open to Work

14,350

Total Points

•
2,541

CSS

2540 pts
Achievements

1 pts
Forum
•
1,963

PHP

1963 pts
Achievements

0 pts
Forum
•
1,747

JavaScript

1747 pts
Achievements

0 pts
Forum
•
1,550

Development Tools

1550 pts
Achievements

0 pts
Forum
•
1,373

HTML

1372 pts
Achievements

1 pts
Forum
•
642

Design

642 pts
Achievements

0 pts
Forum
•
594

Business

594 pts
Achievements

0 pts
Forum

Points are earned whenever you take an important action on Treehouse.
Learn more about when and how points are earned.

Skills & Experience

180 Achievements

Achievement
Creating Distributable OOP Packages

PHP Standards and Best Practices

Achieved
Dec 2, 2014
Achievement
Autoloading and Composer

PHP Standards and Best Practices

Achieved
Dec 2, 2014
Achievement
Databases and International Concerns

PHP Standards and Best Practices

Achieved
Dec 2, 2014
Achievement
Starting Right with PHP Best Practices

PHP Standards and Best Practices

Achieved
Dec 2, 2014
Achievement
PHP Inheritance & Interfaces

Object-Oriented PHP Basics (Retired)

Achieved
Dec 2, 2014
Achievement
Going Mobile

HTML Email Design

Achieved
Oct 29, 2014
Achievement
Designing Email with CSS

HTML Email Design

Achieved
Oct 29, 2014
Achievement
Coding HTML Email

HTML Email Design

Achieved
Oct 28, 2014
Achievement
HTML Email Basics

HTML Email Design

Achieved
Oct 28, 2014
Achievement
Custom Post Type Templates

WordPress Theme Development

Achieved
Oct 20, 2014
Achievement
Building Out WordPress Navigation

WordPress Theme Development

Achieved
Oct 20, 2014
Achievement
Building Page Templates in WordPress

WordPress Theme Development

Achieved
Oct 20, 2014
Achievement
The WordPress Loop

WordPress Theme Development

Achieved
Oct 20, 2014
Achievement
PHP Properties & Methods

Object-Oriented PHP Basics (Retired)

Achieved
Oct 8, 2014
Achievement
PHP Objects and Classes

Object-Oriented PHP Basics (Retired)

Achieved
Aug 4, 2014
Achievement
AJAX and APIs

AJAX Basics (retiring)

Achieved
Jul 19, 2014
Achievement
jQuery and AJAX

AJAX Basics (retiring)

Achieved
Jul 10, 2014
Achievement
Marketing Basics

How to Start a Business (old)

Achieved
Jul 9, 2014
Achievement
Programming AJAX

AJAX Basics (retiring)

Achieved
Jul 7, 2014
Achievement
Forming Your Company

How to Start a Business (old)

Achieved
Jul 6, 2014
Achievement
Corporate Structure

How to Start a Business (old)

Achieved
Jul 6, 2014
Achievement
Why Start a Business?

How to Start a Business (old)

Achieved
Jul 6, 2014
Achievement
AJAX Concepts

AJAX Basics (retiring)

Achieved
Jul 1, 2014
Achievement
Limiting Results in Queries

Using PHP with MySQL

Achieved
Jun 6, 2014
Achievement
Paginating a List: Model and View

Enhancing a Simple PHP Application

Achieved
Jun 6, 2014
Achievement
Paginating a List: Controller

Enhancing a Simple PHP Application

Achieved
Jun 6, 2014
Achievement
Using Relationship Tables

Using PHP with MySQL

Achieved
Jun 6, 2014
Achievement
Filtering Input for Queries

Using PHP with MySQL

Achieved
Jun 5, 2014
Achievement
Adding Search: Model

Enhancing a Simple PHP Application

Achieved
Jun 5, 2014
Achievement
Adding Search: Controller & View

Enhancing a Simple PHP Application

Achieved
Jun 5, 2014
Achievement
Cleaning URLs with Rewrite Rules

Enhancing a Simple PHP Application

Achieved
Jun 4, 2014
Achievement
Querying the Database

Using PHP with MySQL

Achieved
Jun 4, 2014
Achievement
Connecting to MySQL

Using PHP with MySQL

Achieved
Jun 4, 2014
Achievement
Securing and Maintaining a MySQL Database

Database Foundations

Achieved
Jun 4, 2014
Achievement
SQL Calculating, Aggregating and Other Functions

Database Foundations

Achieved
Jun 4, 2014
Achievement
Joining Relational Data Between Tables in SQL

Database Foundations

Achieved
Jun 3, 2014
Achievement
Manipulating Schema with SQL

Database Foundations

Achieved
Jun 3, 2014
Achievement
Creating Tables and Manipulating Data with SQL

Database Foundations

Achieved
Jun 3, 2014
Achievement
Reading Data from Databases with SQL

Database Foundations

Achieved
Jun 2, 2014
Achievement
Installing MySQL Server and MySQL Workbench

Database Foundations

Achieved
Jun 2, 2014
Achievement
Introduction to Data, Databases and SQL

Database Foundations

Achieved
Jun 2, 2014
Achievement
Websites

Accessibility

Achieved
Jun 1, 2014
Achievement
Web Apps

Accessibility

Achieved
Jun 1, 2014
Achievement
Introduction

Accessibility

Achieved
Jun 1, 2014
Achievement
Chrome DevTools Basics

Website Optimization

Achieved
Jun 1, 2014
Achievement
Building WordPress Template Tags, Widgets, and Shortcodes

How to Build a WordPress Plugin

Achieved
Jun 1, 2014
Achievement
Connecting WordPress Plugins with 3rd Party APIs

How to Build a WordPress Plugin

Achieved
May 31, 2014
Achievement
Launching and Supporting a WordPress Plugin

How to Build a WordPress Plugin

Achieved
May 29, 2014
Achievement
Building a WordPress Plugin Settings Page

How to Build a WordPress Plugin

Achieved
May 29, 2014
Achievement
How WordPress Plugins Work

How to Build a WordPress Plugin

Achieved
May 6, 2014
Achievement
Launching a WordPress Site

How to Build a WordPress Theme

Achieved
May 5, 2014
Achievement
Creating a Simple Drawing Application

jQuery Basics (2014)

Achieved
May 1, 2014
Achievement
Creating a Password Confirmation Form

jQuery Basics (2014)

Achieved
Apr 30, 2014
Achievement
Creating a Mobile Drop Down Menu

jQuery Basics (2014)

Achieved
Apr 30, 2014
Achievement
Creating a Simple Lightbox

jQuery Basics (2014)

Achieved
Apr 30, 2014
Achievement
Creating a Spoiler Revealer

jQuery Basics (2014)

Achieved
Apr 30, 2014
Achievement
Introduction to jQuery

jQuery Basics (2014)

Achieved
Apr 30, 2014
Achievement
WordPress and Forms

How to Build a WordPress Theme

Achieved
Apr 29, 2014
Achievement
Extending WordPress Template Functionality

How to Build a WordPress Theme

Achieved
Apr 25, 2014
Achievement
Preparing to Code WordPress Templates

How to Build a WordPress Theme

Achieved
Apr 25, 2014
Achievement
Converting Static HTML into WordPress Templates

How to Build a WordPress Theme

Achieved
Apr 25, 2014
Achievement
WordPress Theme Functions

How to Build a WordPress Theme

Achieved
Apr 23, 2014
Achievement
WordPress Theme Templates

How to Build a WordPress Theme

Achieved
Apr 23, 2014
Achievement
Content Strategy with WordPress

How to Build a WordPress Theme

Achieved
Apr 23, 2014
Achievement
Debugging HTML and CSS Problems

How to Make a Website

Achieved
Apr 23, 2014
Achievement
Sharing a Website

How to Make a Website

Achieved
Apr 23, 2014
Achievement
Responsive Web Design and Testing

How to Make a Website

Achieved
Apr 23, 2014
Achievement
Adding Pages to a Website

How to Make a Website

Achieved
Apr 23, 2014
Achievement
Styling Web Pages and Navigation

How to Make a Website

Achieved
Apr 23, 2014
Achievement
Customizing Colors and Fonts

How to Make a Website

Achieved
Apr 23, 2014
Achievement
CSS: Cascading Style Sheets

How to Make a Website

Achieved
Apr 23, 2014
Achievement
Creating HTML Content

How to Make a Website

Achieved
Apr 23, 2014
Achievement
HTML First

How to Make a Website

Achieved
Apr 22, 2014
Achievement
Beginning HTML and CSS

How to Make a Website

Achieved
Apr 22, 2014
Achievement
Better SEO Through Content

SEO Basics

Achieved
Apr 21, 2014
Achievement
Moving Beyond the Blog

How to Build Your Business Through Blogging

Achieved
Apr 18, 2014
Achievement
Finding Business

How to Build Your Business Through Blogging

Achieved
Apr 18, 2014
Achievement
Creating Content

How to Build Your Business Through Blogging

Achieved
Apr 18, 2014
Achievement
Introduction to Blogging

How to Build Your Business Through Blogging

Achieved
Apr 17, 2014
Achievement
Introduction to SEO

SEO Basics

Achieved
Apr 17, 2014
Achievement
Local WordPress Development

Local WordPress Development

Achieved
Apr 8, 2014
Achievement
WordPress Plugin Best Practices

How to Make a Website with WordPress

Achieved
Apr 8, 2014
Achievement
The Logo Sprint

Logo Design Basics

Achieved
Mar 26, 2014
Achievement
Logo Design 101

Logo Design Basics

Achieved
Mar 26, 2014
Achievement
Widgets and Custom Menus

How to Make a Website with WordPress

Achieved
Mar 20, 2014
Achievement
Refactoring the Codebase

Enhancing a Simple PHP Application

Achieved
Mar 20, 2014
Achievement
Cleaning URLs with Subfolders

Enhancing a Simple PHP Application

Achieved
Mar 17, 2014
Achievement
Integrating Validation Errors

Enhancing a Simple PHP Application

Achieved
Mar 17, 2014
Achievement
Custom Post Types and Fields

How to Make a Website with WordPress

Achieved
Mar 16, 2014
Achievement
Customizing WordPress Themes

How to Make a Website with WordPress

Achieved
Mar 16, 2014
Achievement
WordPress Themes

How to Make a Website with WordPress

Achieved
Mar 16, 2014
Achievement
Installing Wordpress

How to Make a Website with WordPress

Achieved
Mar 16, 2014
Achievement
Simple PHP Application: Wrapping Up The Project

Build a Simple PHP Application

Achieved
Mar 16, 2014
Achievement
Working with PHP Functions

Build a Simple PHP Application

Achieved
Mar 15, 2014
Achievement
Integrating With Paypal

Build a Simple PHP Application

Achieved
Mar 15, 2014
Achievement
Setting Your Course

Careers Foundations

Achieved
Mar 12, 2014
Achievement
Careers in the Tech Industry

Careers Foundations

Achieved
Mar 12, 2014
Achievement
Self-Assessment

Careers Foundations

Achieved
Mar 12, 2014
Achievement
Listing Inventory Items

Build a Simple PHP Application

Achieved
Mar 12, 2014
Achievement
Adding a Contact Form

Build a Simple PHP Application

Achieved
Mar 11, 2014
Achievement
Creating the Menu and Footer

Build a Simple PHP Application

Achieved
Mar 11, 2014
Achievement
Prototyping With Foundation

Framework Basics

Achieved
Mar 11, 2014
Achievement
Getting Started with PHP

Build a Simple PHP Application

Achieved
Mar 11, 2014
Achievement
Grid Layout

CSS Layout Techniques

Achieved
Mar 8, 2014
Achievement
Flexbox Layout

CSS Layout Techniques

Achieved
Mar 8, 2014
Achievement
Positioning Schemes

CSS Layout Techniques

Achieved
Mar 8, 2014
Achievement
Float Layout

CSS Layout Techniques

Achieved
Mar 8, 2014
Achievement
Display Modes

CSS Layout Techniques

Achieved
Mar 5, 2014
Achievement
Workflows

Git Basics

Achieved
Feb 27, 2014
Achievement
Working With Remote Repositories

Git Basics

Achieved
Feb 27, 2014
Achievement
Merging

Git Basics

Achieved
Feb 27, 2014
Achievement
Branches

Git Basics

Achieved
Feb 27, 2014
Achievement
Getting Started With Git

Git Basics

Achieved
Feb 27, 2014
Achievement
Why Version Control Matters

Git Basics

Achieved
Feb 27, 2014
Achievement
Installing Programs

Console Foundations

Achieved
Feb 27, 2014
Achievement
Environment and Redirection

Console Foundations

Achieved
Feb 27, 2014
Achievement
Console Processes

Console Foundations

Achieved
Feb 27, 2014
Achievement
Console Users and Permission

Console Foundations

Achieved
Feb 27, 2014
Achievement
Moving Around in the Console

Console Foundations

Achieved
Feb 27, 2014
Achievement
Advanced Sass Concepts

Sass Basics (retired)

Achieved
Feb 26, 2014
Achievement
Speeding up Workflow With Sass

Sass Basics (retired)

Achieved
Feb 26, 2014
Achievement
Variables, Mixins, and Extending Selectors

Sass Basics (retired)

Achieved
Feb 26, 2014
Achievement
Getting Started with Sass

Sass Basics (retired)

Achieved
Feb 26, 2014
Achievement
Build a Website With Bootstrap

Framework Basics

Achieved
Feb 26, 2014
Achievement
Prototyping With Bootstrap

Framework Basics

Achieved
Feb 26, 2014
Achievement
Introduction to Front-End Frameworks

Framework Basics

Achieved
Feb 25, 2014
Achievement
Customizing Google Maps

Build an Interactive Website

Achieved
Feb 23, 2014
Achievement
Google Maps Integration

Build an Interactive Website

Achieved
Feb 22, 2014
Achievement
jQuery Plugins

Build an Interactive Website

Achieved
Feb 21, 2014
Achievement
Form Validation and Manipulation

Build an Interactive Website

Achieved
Feb 21, 2014
Achievement
Introduction to jQuery

Build an Interactive Website

Achieved
Feb 21, 2014
Achievement
JavaScript Objects

JavaScript Foundations

Achieved
Feb 20, 2014
Achievement
JavaScript Functions

JavaScript Foundations

Achieved
Feb 20, 2014
Achievement
JavaScript Arrays

JavaScript Foundations

Achieved
Feb 19, 2014
Achievement
JavaScript Numbers

JavaScript Foundations

Achieved
Feb 19, 2014
Achievement
JavaScript Strings

JavaScript Foundations

Achieved
Feb 18, 2014
Achievement
Introduction Variables

JavaScript Foundations

Achieved
Feb 18, 2014
Achievement
Functions

Introduction to Programming

Achieved
Feb 18, 2014
Achievement
Objects and Arrays

Introduction to Programming

Achieved
Feb 18, 2014
Achievement
Design Foundations Final

Design Foundations

Achieved
Feb 14, 2014
Achievement
Becoming a Problem Solver

Design Foundations

Achieved
Feb 14, 2014
Achievement
Understanding Aesthetics

Design Foundations

Achieved
Feb 14, 2014
Achievement
Introduction to Design

Design Foundations

Achieved
Feb 14, 2014
Achievement
Advanced Techniques

Build a Responsive Website

Achieved
Feb 10, 2014
Achievement
Responsive Design

Build a Responsive Website

Achieved
Feb 10, 2014
Achievement
Adaptive Design

Build a Responsive Website

Achieved
Feb 10, 2014
Achievement
Fluid Foundation

Build a Responsive Website

Achieved
Feb 10, 2014
Achievement
Introduction to Responsive Web Design

Build a Responsive Website

Achieved
Feb 9, 2014
Achievement
Media Queries

Unused CSS Stages

Achieved
Feb 9, 2014
Achievement
CSS Animations

Unused CSS Stages

Achieved
Feb 9, 2014
Achievement
Transitions and Transforms

Unused CSS Stages

Achieved
Feb 9, 2014
Achievement
Flexbox and Multi-Column Layout

Unused CSS Stages

Achieved
Feb 9, 2014
Achievement
Gradients

CSS Foundations

Achieved
Feb 8, 2014
Achievement
Web Typography

CSS Foundations

Achieved
Feb 8, 2014
Achievement
Backgrounds and Borders

CSS Foundations

Achieved
Feb 5, 2014
Achievement
CSS Box Model

CSS Foundations

Achieved
Feb 5, 2014
Achievement
Workspace Basics

Photoshop Foundations

Achieved
Feb 4, 2014
Achievement
Control Structures

Introduction to Programming

Achieved
Feb 4, 2014
Achievement
Basics

Introduction to Programming

Achieved
Feb 4, 2014
Achievement
Forms

HTML

Achieved
Feb 4, 2014
Achievement
Tables

HTML

Achieved
Feb 4, 2014
Achievement
Objects

HTML

Achieved
Feb 4, 2014
Achievement
Lists

HTML

Achieved
Feb 4, 2014
Achievement
Links

HTML

Achieved
Feb 4, 2014
Achievement
Text

HTML

Achieved
Feb 4, 2014
Achievement
Introduction

HTML

Achieved
Feb 4, 2014
Achievement
Text, Fonts, and Lists

CSS Foundations

Achieved
Feb 4, 2014
Achievement
Values and Units

CSS Foundations

Achieved
Feb 4, 2014
Achievement
Advanced Selectors

CSS Foundations

Achieved
Feb 4, 2014
Achievement
Selectors

CSS Foundations

Achieved
Feb 3, 2014
Achievement
Getting Started with CSS

CSS Foundations

Achieved
Feb 3, 2014
Achievement
Color Theory

Aesthetic Foundations

Achieved
Feb 3, 2014
Achievement
Principles

Aesthetic Foundations

Achieved
Feb 3, 2014
Achievement
Elements

Aesthetic Foundations

Achieved
Feb 3, 2014
Achievement
Styling Content

Build a Simple Website

Achieved
Feb 2, 2014
Achievement
Text Editors and HTML

Build a Simple Website

Achieved
Feb 2, 2014
Achievement
Launching the Website

Build a Simple Website

Achieved
Feb 2, 2014
Achievement
Creating a Website Structure

Build a Simple Website

Achieved
Feb 2, 2014
Achievement
Website Basics

Build a Simple Website

Achieved
Feb 2, 2014
Achievement
Newbie

Achieved
Feb 2, 2014