Bernie Dodge's WebQuest page: http://webquest.org/ has many Useful Resources (tab on left), including a search engine, help videos, a quest template, etc.

What is a WebQuest? - a short and sweet explanation

My page, WebQuests: Using authentic Content with ESOL Support, has additional resources for language support for WebQuests originally written for native speakers.

Most of these ESL/EFL WebQuests were created during the 2007 Electronic Village Online session, Creating Webquests, moderated by Paula Emmert. These may be of varying quality, but they give you a good idea of the range that can be achieved. Some are not ESL/EFL. Where URLs were missing, I have substituted others. Many WebQuests can be found by searching the QuestGarden (free for 30 days). Enjoy your explorations!

Getting Hitched: Exploring Wedding Customs in other Cultures
a WebQuest for upper intermediate high school ESL students, by Chris Dussault / Emmanuel Batungwanayo

Using the Internet to Teach Writing to English Language Learners
A WebQuest for Teachers of ESOL developed for students in an MEd in Second Language Education by Maryanne Burgos

Learning more about the TOEFL and IELTS
 A WebQuest for EFL learners preparing to enter university in an English-speaking country. I made this WebQuest two years ago for Christine Bauer-Ramazani's online CALL class (by Seyyedeh Susan Marandi)

The Perfect Society
A WebQuest by Nellie Muller based on The Giver: A Novel by Lois Lowry

Choosing a Book to Read for Pleasure and Fluency
Some students like to read, and some do not. On this quest students help four students shop for a book based on their personal interest, needs, and time. Finally, students write their own reader profile and choose the book that is right for them. By Sue Peterson, Baruch College

Indian Independence
Creating an awareness of Indian Freedom Struggle, the contributions made by great leaders and the heritage among young learners. By Revathy Viswanathan, ICFAI National College.

The Death Penalty
This is a WebQuest that takes students through their initiial research on the topic for their final research paper. By Allan Ocleasa, Cebu Normal University.

Will the real Thomas Merton please stand up?
A WebQuest for college students reading Merton's writings. Academic/college students. By Nancy McKeand, St. Joseph Seminary College.


The Copacabana Restaurant FoodQuest for Intermediate-Advanced EFL students. By Bee Dieu.

And if the Aztecs had prevailed?
An alternate history WebQuest by JoAnn Miller

Let's Read Japanese Fairy Tales
A WebQuest for young intermediate ESL learners (grades 3-4), by Hiroko Kunimatsu / Stacy Wells

Crime Prevention WebQuest
for advanced students by JoAnn Miller

Run For Your Health
A WebQuest on healthy living  by Nellie Muller

Saving the Gorillas
A WebQuest on QuestGarden by JoAnn Miller
 
That's a Possibility
A UFO WebQuest for advanced students by JoAnn Miller

The Last Spin
A WebQuest by Nellie Muller on teenage street gangs, based on The Last Spin by Evan Hunter

WebQuest on Shakespeare 
"This Shakespearean webquest includes activities on Shakespeare’s life, Romeo and Juliet, ’boy players’ and famous quotes from Shakespeare plays that we still use today."

Why did they do that?
A WebQuest on flags and their origins for 8th graders by Nellie Deutsch, Liz lutz-Tah, Jim Nuyen, Kristie Radford, and Robin Wiltbank

New York, New York: A Virtual Vacation
A WebQuest for intermediate students by JoAnn Miller

Adolescents and the Internet
An introduction to the Internet for secondary students by Maria Adelina Maia, Escola Secundaria da Trofa.

Ecological Footprint WebQuest
Our impact on the Earth is greater than we think. Showing our students this reality and help them to think of ways to reduce this impact is the ultimate goal of this WebQuest. For Students grades 6-12. Developed by Vicky Saumell, Instituto San Francisco de Asis

Party Planning
The holidays and celebrations of the United States understood through planning a community activity. by Rimi Lee, UPenn, and Anastasia Pantelidis, UPenn.

Relational Databases: Modeling Information
Students analyse information from some real examples in the Internet, understand how to model information by being oriented to specific sites and, after that, design a relational database for a particular system. Grades 9-12. By Maria Maia, Escola Secundaria da Trofa.

Death Penalty in the United States
Each team of middle school students will attempt to convince politicians to support or oppose the death penalty. By Anthony Gibson, Frisbie Middle School.

YOU FOOD AVENTURE
What are the best eating habits to be healthy? For secondary students. By Zouita Abdesalam, Mohamed V Lâayoune, Morocco