Course image backgrounds: Pexels:

<ul>
    <li>Tirachard Kumtanom - https://www.pexels.com/photo/black-ball-point-pen-with-brown-spiral-notebook-733852/</li>
    <li>olia danilevich  - https://www.pexels.com/photo/school-themed-flatlay-5088021/</li>
    <li>Marie Martin - https://www.pexels.com/photo/back-to-school-flatlay-5088008/</li>
    <li>Jess Bailey Designs  - https://www.pexels.com/photo/pens-near-keyboard-and-paper-clips-1558690/</li>
    <li>Rahul Pandit - https://www.pexels.com/photo/assorted-color-crayons-2078147/</li>
</ul>