Spelling / Vocabulary City is a great site for students and teachers. This site has a ton of learning activities and games for spelling and vocabulary words. They have pre-made lists you can access or you can create your own! The entire site is free to use, you just have to register. There is the option of premium membership, if you desire, which gives you access to even more resources.
There are links for students, parents, teachers, and schools/districts. Each page has different information and activities. When teachers register, they can create their own lists and then save them for later use. What's neat is that students can use this site from any computer 24/7 - so they can access it at home.
This site has a lot of good teacher resources and all the activities are fun for students. They will feel like they are just playing a game, but in reality they are getting extra practice with spelling and vocabulary. The site includes FAQ's in the form of videos to help teachers and parents if they need it. It does seem a little overwhelming when you first visit the site, but with a little playing around and navigating the site, it turns out to be very simple. I think one of the best things is that your created lists can be saved for in the future. Almost all of the games and activities are also printable, which makes this site even more valuable.
Check it out! Click on the picture below to be taken to the site!