In his video, Must-Have Google Slides Add-Ons for Teachers (https://youtu.be/jvpU2qPAt-k), Sam talks about 9 helpful Google Slides Add-Ons.
2. Extensis Fonts
4. Slides Translator
5. Easy Accents
7. Pear Deck
If you have never looked through or installed an add-on it is simple. I have created a very quick tutorial to show you how.
Google: Install an Add-On (https://bit.ly/38on9XO)