Information technology has been significantly developed during the past decades. Teachers leverage various technologies to enhance teaching experience and knowledge delivery. Students explore diverse knowledge from numerous learning resources on the Web. Furthermore, the COVID-19 pandemic accelerates processing technology integration in education. During the pandemic, Zoom and Google Classroom were widely used for course content delivery, and they are still presenting their values in the post-pandemic era. Some other applications are also continuously adopted when in-person teaching and learning have been resumed. In this paper, a literature review-based approach is applied to summarize recent achievements in educational technology and present several promising directions for the future of education, including artificial intelligence-powered content generation and metaverse. A roadmap is proposed to illustrate the current and future progress of education technology. Meanwhile, safeguards are also provided to guide schools and parents to be aware of the potential hazards during technology use at the K-12 education level.