8.1 Licensed icons used:
Exercises / Homework
Icons made by prosymbols available on Flaticon.com.
Direct download: https://www.flaticon.com/free-icon/homework_748646
Study
“Study” icon original from http://www.onlinewebfonts.com/icon is licensed by CC BY 3.0.
Icon direct download link: http://cdn.onlinewebfonts.com/svg/download_532202.png
Version used: colorized with PhotoShop by JYS in herits CC BY 3.0 license.