Vocab Ahead is a wonderful resource for illustrated vocabulary words.
The site takes difficult to understand words and adds audio and illustrations in the form of short videos.
They also have a page just for teachers where you can:
1. Create Your Personalized Lists
You can create your personalized lists with words of your choice, meeting the academic level of your students. Here is how!
2. Share Your Lists with Your Students
Here is how you can share your personalized word lists with your students and other users.
3. Embed a Customized Widget in Your Blog or Webpage
You can create a customized widget for your blog or classroom webpage. To learn more Click here.
4. Engage Your Students in the Vocabulary Building Process
You can make vocabulary building fun by assigning vocabulary video projects to your students and uploading their work to our website. Learn More!
Finally, Vocab Ahead has also create mobile apps for several devices. They have a couple demo apps for free and several full versions for $1.99.