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There is an ongoing need to integrate computing-related education within existing K-12 curriculum to maintain global competitiveness and security. Our research addresses the challenge of equitable access to concepts from across the computing spectrum - from computing systems to computer science and computational thinking. The research focuses on overcoming the digital divide by enabling K-12 educators to become conduits for computing education, thereby equipping students with essential computational skills and knowledge. Through two National Science Foundation awards, the team used a mixed-methods approach to develop and assess several traditional and non-traditional teacher engagements. These engagements included a week-long professional development program for K-8 educators and librarians, aimed at designing computing lessons for integration into non-CS disciplines, and a six-week research experience for educators, focused on infusing CS and research concepts into classroom environments. Each of these two engagements was repeated for three consecutive years for a total of six engagements. The assessment of these methods involved qualitative analyses of educator feedback, lesson plan evaluations, and quantitative measures of student engagement and learning outcomes. Our collected artifacts includes over 300 teacher-created and led, innovative lessons spanning a broad spectrum of subjects and educational levels. These lessons have directly engaged several thousand students, demonstrating a marked improvement in computational thinking skills across diverse student populations. Moreover, the engagements have resulted in a significant shift towards viewing computational thinking as an integral element of K-12 education, rather than a standalone discipline. This work highlights the process through which educators can become empowered to integrate computing principles across various subjects and also showcases the tangible benefits of such integration. By facilitating the authentic, teacher-led development of computing lessons and their integration into existing curricula, our research underscores the critical role of educators in bridging the digital divide and fostering a comprehensive educational experience that includes topics from across the computing spectrum.