Wizer is an online platform for creating multimedia worksheet activities that you can distribute to students through a variety of means including Google Classroom. On Wizer you can design worksheet activities that include pictures, text, videos, and audio. One of its better features is the option to add questions directly on top of images and diagrams. A variety of question formats are supported including open response, multiple choice, and matching questions. Years ago I made this video about how to use Wizer. The interface has changed a little since then but the tools are the same.
This month Wizer released a Google Drive add-on that lets you quickly convert PDFs that are in your Google Drive into online worksheets on Wizer. With the add-on installed you can simply select any PDF in your Google Drive then choose "open with Wizer" to use that PDF in Wizer where you can then add interactive elements.
Applications for Education
Wizer has exploded in popularity this year as a result of more teachers looking for tools to create online activities for elementary school students. The Google Drive add-on should make it easier for those who already have PDF worksheets stored in Google Drive to create online activities for their students to complete. I particularly like the ability to add image and diagram-based questions to PDFs in Wizer.