Learning computational thinking and programming is important for the twenty-first century. A variety of research studies have examined these areas and many systematic reviews and meta-analyses have been published since 2006, reviewing these research studies. This chapter provides an overview of 37 systematic reviews and 12 meta-analysis studies on computational thinking and programming. Overviews of review studies are useful in providing a wider and more in-depth understanding of the area under study. Specifically, this chapter highlights areas of difficulties in learning to program and discusses relevant skills and programming tools and the gaps in research identified in the reviews.