RLE 4 all. With Alice Millour, we designed an unplugged CS activity for popularizing image encoding techniques (bitmap, RLE) to middle/high school students. Follow this link for details (in French).
GENEPI. I'm associated to the GENEPI project whose goal is to reconsider educational methods for computer science, in the era of generative AI.
Software and programming
Sagemath. I use sagemath for my research and my teaching. Sagemath is an open-source computer algebra system that covers many fields in mathematics. I especially use the coding theory module to which I personally contributed.