Google Drive
Pretty much your "Office" suite, when it comes to Chromebooks.
Google Docs: Word Processing Pluto Essay
Google Sheets: Spreadsheets Planet Characteristics
Google Slides: Presentations
Google Drawings: Solar System Models
Google Forms:
Organize!
All those files just sitting in your drive can be a cluttery mess. While you do have a great search option, your best bet is to organize.
#1 Title your documents or else your Drive will be nothing but "Untitled Document"
#2 Set up folders.
#3 Nest more folders in other folders.