text: Texts are adapted from CC Certification for Educators. CC BY license. 
  BY, SA, NC, ND icons, CC BY, CC BY-SA, CC BY-NC, CC BY-NC-SA, CC BY-ND, and CC BY-NC-ND buttons are trademark of Creative Commons, and subject to their policies. 
  3-layer design of CC license image is taken from CC Certification for Educators. CC BY license. 
  Line, icons, and gradients are from Canva, and subject to their policies. 