theodp writes: Politico reports that just one day after Facebook launched TechPrep, a highly-publicized initiative to attract more minorities and women to coding, Google, Facebook, Microsoft, and Code.org quietly sent a letter to top education lawmakers in the House and Senate insisting that computer science "must" be added to the list of "core academic subjects" and states be given resources to improve STEM education programs. "Computer science is marginalized throughout K-12 education," reads the letter. "We need to improve access for all students, particularly groups who have traditionally been underrepresented." Echoing the last point at this month's Grace Hopper Women in Computer Celebration, YouTube CEO Susan Wojcicki called for mandatory computer science in schools, suggesting that boys — like her own son — are monopolizing the family computer across America, leaving girls — like her own daughter — out of the conversation when it comes to technology (video @38:33). The new round of hand-wringing comes as tech companies face the deadline for filing their 2015 EEO-1 surveys and seek more tech-friendly U.S. visa and OPT STEM policies, so it's probably worth remembering that Microsoft proposed tech could turn workforce diversity lemons into H-1B visa lemonade by connecting tech immigration to K-12 CS education.