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David Ker

Seattle, WA

I am a web developer specializing in Ruby on Rails. With a background in networking and IT support, I’m a fast learner, and I really like figuring out solutions to problems.

14,439

Total Points

•
3,675

Ruby

3645 pts
Achievements

30 pts
Forum
•
2,750

JavaScript

2750 pts
Achievements

0 pts
Forum
•
2,375

CSS

2375 pts
Achievements

0 pts
Forum
•
1,735

Development Tools

1708 pts
Achievements

27 pts
Forum
•
1,177

Databases

1177 pts
Achievements

0 pts
Forum
•
922

HTML

922 pts
Achievements

0 pts
Forum
•
780

Design

780 pts
Achievements

0 pts
Forum
•
13

Business

0 pts
Achievements

13 pts
Forum

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

178 Achievements

Achievement
Using a jQuery Carousel

Using jQuery Plugins

Achieved
Oct 5, 2016
Achievement
Add a Sticky Navigation Bar

Using jQuery Plugins

Achieved
Oct 5, 2016
Achievement
Introducing jQuery Plugins

Using jQuery Plugins

Achieved
Oct 5, 2016
Achievement
Subqueries

Querying Relational Databases

Achieved
Sep 26, 2016
Achievement
Set Operations

Querying Relational Databases

Achieved
Sep 26, 2016
Achievement
Joining Table Data with SQL

Querying Relational Databases

Achieved
Sep 23, 2016
Achievement
Table Relationships

Querying Relational Databases

Achieved
Sep 23, 2016
Achievement
Database Keys

Querying Relational Databases

Achieved
Sep 21, 2016
Achievement
Database Normalization

Querying Relational Databases

Achieved
Sep 21, 2016
Achievement
Handling Errors When Manipulating Data

Modifying Data with SQL

Achieved
Sep 20, 2016
Achievement
Deleting Data from a Database

Modifying Data with SQL

Achieved
Sep 20, 2016
Achievement
Updating Data in a Database

Modifying Data with SQL

Achieved
Sep 20, 2016
Achievement
Adding Data to a Database

Modifying Data with SQL

Achieved
Sep 20, 2016
Achievement
Date and Time Functions

Reporting with SQL

Achieved
Sep 19, 2016
Achievement
Aggregate and Numeric Functions

Reporting with SQL

Achieved
Sep 19, 2016
Achievement
Working with Text

Reporting with SQL

Achieved
Sep 19, 2016
Achievement
Ordering, Limiting and Paging Results

Reporting with SQL

Achieved
Sep 16, 2016
Achievement
Finding the Data You Want

SQL Basics

Achieved
Sep 15, 2016
Achievement
Getting Data from a Database

SQL Basics

Achieved
Sep 15, 2016
Achievement
Data, Databases and SQL

SQL Basics

Achieved
Sep 15, 2016
Achievement
Quiz Practice Project

Object-Oriented JavaScript (2015)

Achieved
Sep 15, 2016
Achievement
Prototypal Inheritance

Object-Oriented JavaScript (2015)

Achieved
Sep 12, 2016
Achievement
Constructor Functions & Prototypes

Object-Oriented JavaScript (2015)

Achieved
Sep 2, 2016
Achievement
Introduction to Methods

Object-Oriented JavaScript (2015)

Achieved
Sep 2, 2016
Achievement
Creating a Simple Drawing Application

jQuery Basics (2014)

Achieved
Sep 2, 2016
Achievement
Creating a Password Confirmation Form

jQuery Basics (2014)

Achieved
Sep 2, 2016
Achievement
Creating a Mobile Drop Down Menu

jQuery Basics (2014)

Achieved
Aug 8, 2016
Achievement
Creating a Simple Lightbox

jQuery Basics (2014)

Achieved
Aug 5, 2016
Achievement
JavaScript Objects

JavaScript Loops, Arrays and Objects

Achieved
Aug 5, 2016
Achievement
JavaScript Arrays

JavaScript Loops, Arrays and Objects

Achieved
Aug 5, 2016
Achievement
JavaScript Loops

JavaScript Loops, Arrays and Objects

Achieved
Aug 5, 2016
Achievement
JavaScript Functions

JavaScript Basics (Retired)

Achieved
Aug 5, 2016
Achievement
JavaScript Conditional Statements

JavaScript Basics (Retired)

Achieved
Aug 5, 2016
Achievement
JavaScript Numbers

JavaScript Basics (Retired)

Achieved
Aug 5, 2016
Achievement
JavaScript Variables

JavaScript Basics (Retired)

Achieved
Aug 5, 2016
Achievement
Introducing JavaScript

JavaScript Basics (Retired)

Achieved
Aug 5, 2016
Achievement
Getting Started with Advanced Sass

Advanced Sass

Achieved
Oct 21, 2015
Achievement
Advanced Sass Concepts

Sass Basics (retired)

Achieved
Oct 15, 2015
Achievement
Speeding up Workflow With Sass

Sass Basics (retired)

Achieved
Oct 15, 2015
Achievement
Variables, Mixins, and Extending Selectors

Sass Basics (retired)

Achieved
Oct 14, 2015
Achievement
Getting Started with Sass

Sass Basics (retired)

Achieved
Oct 13, 2015
Achievement
Scrum Artifacts

Scrum Basics

Achieved
Aug 17, 2015
Achievement
Scrum Events

Scrum Basics

Achieved
Aug 17, 2015
Achievement
Introducing Scrum

Scrum Basics

Achieved
Jul 10, 2015
Achievement
What is Agile?

Scrum Basics

Achieved
Jul 10, 2015
Achievement
Hosting with GitHub Pages

Build a Blog with Jekyll and GitHub Pages

Achieved
Jun 2, 2015
Achievement
Building and Customizing the Blog

Build a Blog with Jekyll and GitHub Pages

Achieved
Jun 2, 2015
Achievement
Getting Started with Jekyll

Build a Blog with Jekyll and GitHub Pages

Achieved
Jun 2, 2015
Achievement
The Box Model

CSS Basics (2014)

Achieved
Feb 24, 2015
Achievement
Understanding Values and Units

CSS Basics (2014)

Achieved
Feb 24, 2015
Achievement
Creating a Spoiler Revealer

jQuery Basics (2014)

Achieved
Feb 24, 2015
Achievement
Introduction to jQuery

jQuery Basics (2014)

Achieved
Feb 24, 2015
Achievement
Password Resets and Testing

User Authentication with Rails

Achieved
Feb 23, 2015
Achievement
Adding User Support to Our Application

User Authentication with Rails

Achieved
Feb 23, 2015
Achievement
Password Hashing and Sign-In

User Authentication with Rails

Achieved
Feb 20, 2015
Achievement
Basic Selectors

CSS Basics (2014)

Achieved
Feb 16, 2015
Achievement
Getting Started with CSS

CSS Basics (2014)

Achieved
Feb 16, 2015
Achievement
Blocks Practice

Ruby Blocks

Achieved
Feb 16, 2015
Achievement
Working With Blocks

Ruby Blocks

Achieved
Feb 16, 2015
Achievement
AR Extensions

ActiveRecord Basics

Achieved
Feb 16, 2015
Achievement
Callbacks

ActiveRecord Basics

Achieved
Feb 16, 2015
Achievement
Query Interface

ActiveRecord Basics

Achieved
Feb 16, 2015
Achievement
Validation

ActiveRecord Basics

Achieved
Feb 12, 2015
Achievement
Ruby Blocks

Ruby Blocks

Achieved
Feb 6, 2015
Achievement
Migrations and Relationships

ActiveRecord Basics

Achieved
Feb 6, 2015
Achievement
Introduction to ActiveRecord

ActiveRecord Basics

Achieved
Jan 22, 2015
Achievement
Build a Todo List Application with Rails 4

Build a Todo List Application with Rails 4

Achieved
Jan 13, 2015
Achievement
Securing and Maintaining a MySQL Database

Database Foundations

Achieved
Jan 9, 2015
Achievement
SQL Calculating, Aggregating and Other Functions

Database Foundations

Achieved
Jan 8, 2015
Achievement
Joining Relational Data Between Tables in SQL

Database Foundations

Achieved
Jan 7, 2015
Achievement
Manipulating Schema with SQL

Database Foundations

Achieved
Jan 7, 2015
Achievement
Creating Tables and Manipulating Data with SQL

Database Foundations

Achieved
Jan 7, 2015
Achievement
Reading Data from Databases with SQL

Database Foundations

Achieved
Jan 7, 2015
Achievement
Installing MySQL Server and MySQL Workbench

Database Foundations

Achieved
Jan 7, 2015
Achievement
Introduction to Data, Databases and SQL

Database Foundations

Achieved
Jan 7, 2015
Achievement
Build a Simple Todo List Program

Ruby Booleans

Achieved
Jan 6, 2015
Achievement
Ruby Booleans

Ruby Booleans

Achieved
Jan 6, 2015
Achievement
Build a Bank Account Class

Ruby Objects and Classes

Achieved
Jan 5, 2015
Achievement
Ruby Variables and Methods

Ruby Objects and Classes

Achieved
Jan 5, 2015
Achievement
Ruby Objects and Classes

Ruby Objects and Classes

Achieved
Jan 5, 2015
Achievement
Build a Simple Contact List

Ruby Loops

Achieved
Jan 5, 2015
Achievement
Ruby Iteration

Ruby Loops

Achieved
Jan 5, 2015
Achievement
Ruby Loops

Ruby Loops

Achieved
Jan 5, 2015
Achievement
Build a Grocery List Program

Ruby Collections

Achieved
Jan 5, 2015
Achievement
Ruby Hashes

Ruby Collections

Achieved
Jan 5, 2015
Achievement
Ruby Arrays

Ruby Collections

Achieved
Jan 5, 2015
Achievement
Ruby Logical Operators

Ruby Operators and Control Structures

Achieved
Jan 5, 2015
Achievement
Ruby Control Structures

Ruby Operators and Control Structures

Achieved
Jan 5, 2015
Achievement
Ruby Operators

Ruby Operators and Control Structures

Achieved
Jan 5, 2015
Achievement
Ruby Testing

Ruby Foundations

Achieved
Jan 1, 2015
Achievement
Standard Library

Ruby Foundations

Achieved
Jan 1, 2015
Achievement
Ruby Core

Ruby Foundations

Achieved
Dec 23, 2014
Achievement
Ruby Modules

Ruby Foundations

Achieved
Dec 22, 2014
Achievement
Ruby Procs & Lambdas

Ruby Foundations

Achieved
Dec 22, 2014
Achievement
Ruby Blocks

Ruby Foundations

Achieved
Dec 8, 2014
Achievement
Ruby Loops

Ruby Foundations

Achieved
Nov 6, 2014
Achievement
Ruby Methods

Ruby Foundations

Achieved
Sep 29, 2014
Achievement
Ruby Hashes

Ruby Foundations

Achieved
Sep 22, 2014
Achievement
Ruby Arrays

Ruby Foundations

Achieved
Sep 22, 2014
Achievement
Ruby Numbers

Ruby Foundations

Achieved
Sep 19, 2014
Achievement
Ruby Strings

Ruby Foundations

Achieved
Sep 19, 2014
Achievement
Objects, Classes, and Variables

Ruby Foundations

Achieved
Sep 19, 2014
Achievement
Ruby Basics

Ruby Foundations

Achieved
Sep 18, 2014
Achievement
Installing a Ruby Development Environment

Installing a Ruby Development Environment

Achieved
Sep 9, 2014
Achievement
Workflows

Git Basics

Achieved
Sep 9, 2014
Achievement
Working With Remote Repositories

Git Basics

Achieved
Sep 9, 2014
Achievement
Merging

Git Basics

Achieved
Sep 9, 2014
Achievement
Branches

Git Basics

Achieved
Sep 9, 2014
Achievement
Getting Started With Git

Git Basics

Achieved
Sep 9, 2014
Achievement
Why Version Control Matters

Git Basics

Achieved
Sep 8, 2014
Achievement
Installing Programs

Console Foundations

Achieved
Sep 8, 2014
Achievement
Environment and Redirection

Console Foundations

Achieved
Sep 8, 2014
Achievement
Console Processes

Console Foundations

Achieved
Sep 8, 2014
Achievement
Console Users and Permission

Console Foundations

Achieved
Sep 8, 2014
Achievement
Moving Around in the Console

Console Foundations

Achieved
Sep 8, 2014
Achievement
JavaScript Objects

JavaScript Foundations

Achieved
Sep 8, 2014
Achievement
JavaScript Functions

JavaScript Foundations

Achieved
Sep 7, 2014
Achievement
JavaScript Arrays

JavaScript Foundations

Achieved
Sep 1, 2014
Achievement
JavaScript Numbers

JavaScript Foundations

Achieved
Aug 31, 2014
Achievement
JavaScript Strings

JavaScript Foundations

Achieved
Aug 26, 2014
Achievement
Ruby Methods

Ruby Basics (Retired)

Achieved
Aug 26, 2014
Achievement
Ruby Numbers (Ruby Basics)

Ruby Basics (Retired)

Achieved
Aug 26, 2014
Achievement
Ruby Strings (Ruby Basics)

Ruby Basics (Retired)

Achieved
Aug 24, 2014
Achievement
How Ruby Works

Ruby Basics (Retired)

Achieved
Aug 24, 2014
Achievement
Introduction Variables

JavaScript Foundations

Achieved
Aug 4, 2014
Achievement
Functions

Introduction to Programming

Achieved
Aug 4, 2014
Achievement
Objects and Arrays

Introduction to Programming

Achieved
Aug 4, 2014
Achievement
Control Structures

Introduction to Programming

Achieved
Aug 4, 2014
Achievement
Basics

Introduction to Programming

Achieved
Aug 4, 2014
Achievement
Masks Basics

Photoshop Foundations

Achieved
Jul 22, 2014
Achievement
Introduction to Brand Identity

Brand Identity Basics

Achieved
Jul 14, 2014
Achievement
The Logo Sprint

Logo Design Basics

Achieved
Jul 14, 2014
Achievement
Logo Design 101

Logo Design Basics

Achieved
Jul 14, 2014
Achievement
Layer Basics

Photoshop Foundations

Achieved
Jul 7, 2014
Achievement
Workspace Basics

Photoshop Foundations

Achieved
Jul 7, 2014
Achievement
Design Foundations Final

Design Foundations

Achieved
Jul 7, 2014
Achievement
Becoming a Problem Solver

Design Foundations

Achieved
Jul 7, 2014
Achievement
Understanding Aesthetics

Design Foundations

Achieved
Jul 7, 2014
Achievement
Introduction to Design

Design Foundations

Achieved
Jul 7, 2014
Achievement
Color Theory

Aesthetic Foundations

Achieved
Jul 7, 2014
Achievement
Principles

Aesthetic Foundations

Achieved
Jul 7, 2014
Achievement
Elements

Aesthetic Foundations

Achieved
Jul 7, 2014
Achievement
Grid Layout

CSS Layout Techniques

Achieved
Jul 5, 2014
Achievement
Flexbox Layout

CSS Layout Techniques

Achieved
Jul 4, 2014
Achievement
Positioning Schemes

CSS Layout Techniques

Achieved
Jul 4, 2014
Achievement
Float Layout

CSS Layout Techniques

Achieved
Jul 4, 2014
Achievement
Display Modes

CSS Layout Techniques

Achieved
Jul 1, 2014
Achievement
Forms

HTML

Achieved
Jul 1, 2014
Achievement
Tables

HTML

Achieved
Jul 1, 2014
Achievement
Objects

HTML

Achieved
Jul 1, 2014
Achievement
Links

HTML

Achieved
Jul 1, 2014
Achievement
Lists

HTML

Achieved
Jul 1, 2014
Achievement
Text

HTML

Achieved
Jul 1, 2014
Achievement
Introduction

HTML

Achieved
Jul 1, 2014
Achievement
Debugging HTML and CSS Problems

How to Make a Website

Achieved
Jul 1, 2014
Achievement
Sharing a Website

How to Make a Website

Achieved
Jul 1, 2014
Achievement
Responsive Web Design and Testing

How to Make a Website

Achieved
Jul 1, 2014
Achievement
Adding Pages to a Website

How to Make a Website

Achieved
Jul 1, 2014
Achievement
Styling Web Pages and Navigation

How to Make a Website

Achieved
Jul 1, 2014
Achievement
Customizing Colors and Fonts

How to Make a Website

Achieved
Jul 1, 2014
Achievement
CSS: Cascading Style Sheets

How to Make a Website

Achieved
Jul 1, 2014
Achievement
Creating HTML Content

How to Make a Website

Achieved
Jun 30, 2014
Achievement
HTML First

How to Make a Website

Achieved
Jun 30, 2014
Achievement
Beginning HTML and CSS

How to Make a Website

Achieved
Jun 30, 2014
Achievement
Media Queries

Unused CSS Stages

Achieved
Jun 3, 2014
Achievement
CSS Animations

Unused CSS Stages

Achieved
Jun 2, 2014
Achievement
Transitions and Transforms

Unused CSS Stages

Achieved
May 27, 2014
Achievement
Flexbox and Multi-Column Layout

Unused CSS Stages

Achieved
May 27, 2014
Achievement
Gradients

CSS Foundations

Achieved
May 27, 2014
Achievement
Web Typography

CSS Foundations

Achieved
May 27, 2014
Achievement
Backgrounds and Borders

CSS Foundations

Achieved
May 26, 2014
Achievement
CSS Box Model

CSS Foundations

Achieved
May 26, 2014
Achievement
Text, Fonts, and Lists

CSS Foundations

Achieved
May 26, 2014
Achievement
Values and Units

CSS Foundations

Achieved
May 26, 2014
Achievement
Advanced Selectors

CSS Foundations

Achieved
May 25, 2014
Achievement
Selectors

CSS Foundations

Achieved
May 24, 2014
Achievement
Getting Started with CSS

CSS Foundations

Achieved
May 22, 2014
Achievement
Newbie

Achieved
May 22, 2014