Given the emergence of the use of digital tools in English teaching and learning and of sociocultural theory (SCT) in recent years, this paper sets out to introduce the concepts of tools, digital tools, and mediation in SCT. It then argues for the ground for enhancing and promoting the use of digital tools in English learning and teaching. Studies documenting evidence of technology-enhanced artefacts are reviewed to discuss how mediation of digital tools brings about cognitive, social, and linguistic changes to EFL/L2 learners. The paper concludes with implications for language education in the digital era, particularly English learning with digital tools.