Interactive Slides
Google Slides is a great way to create lessons that easily upload to Google Classroom or Seesaw. Paired with Screencastify, you have a great tool for offering direct instruction to remote learners.
How to make slides
How to add closed captions
How to narrate slides
How to make graphic organizers
This site is full of FREE interactive templates you can use in Google Slides. It includes templates for games, planners, notebooks, presentations and MUCH more.
Nearpod is a student engagement platform with meaningful content. There is a variety of free and paid lessons already created for you, or you can create your own interactive lessons. The features are very engaging for upper-elementary, jr. high, and high school students. You have to pay for some lessons or purchase a subscription. However, you can access a lot of great lessons and create your own for free. It also seamlessly connects to Google Classroom.
Slidesgo and Slides Carnival offer free themed templates you can use to make your slides more engaging. They also offer free templates to create games, such as Jeopardy, you can customize to fit your content.