Choose Insert, then More Gadgets.
In the Google Sites Editor, find the Insert menu, and open it. You will be able to see a list of gadgets you can add to your site, like Links, Tables, and Images. Select More Gadgets. This lets you add editable tools such as the POWr Survey to your page.
Copy and Paste
The Gadget manager will appear. Click Add Gadget by URL. Then paste this URL into the field. Select Add to finish.
Adjust Height and Width
Now that you’ve added your new, customizable Survey Widget to your Google Sites page, you’ll probably want to adjust the size and shape of the Widget. Use the different options in the window to select the height and width of your plugin. We don't recommend it, but you can insert a scrollbar, title or border to your Survey Widget. You'll have more control while editing right through the plugin itself.
Set up POWr Survey
Go to your live Google Sites web page and click the Settings Icon in the upper right corner of the Survey Widget.
In the POWr Editor, click Import Existing Survey, find Survey- and click Copy.