The rapid advancement of educational technology has significantly transformed teaching and learning processes across educational contexts. This paper provides an overview of the impact of educational technology on learning outcomes, pedagogical practices, and instructional design. Drawing upon existing literature, meta-analyses, and theoretical frameworks, the study highlights that technology integration generally exerts a positive influence on cognitive skills, knowledge acquisition, student engagement, motivation, and self-regulated learning. However, the magnitude of these effects varies across subject domains, instructional strategies, and levels of education, largely depending on the quality of pedagogical alignment rather than the technology itself. The paper examines key theoretical foundations—including constructivism, sociocultural theory, cognitivism, and experiential learning—that inform the effective use of technology in education. It also discusses prominent pedagogical models such as TPACK and SAMR, which emphasize the integration of technology with content knowledge and instructional objectives. Furthermore, the study addresses challenges related to teacher preparedness, professional development, equity, and the digital divide, emphasizing that access alone is insufficient without meaningful pedagogical application. Overall, the review underscores that educational technology functions most effectively as a mediating tool that supports knowledge construction, collaboration, reflection, and assessment. The findings suggest the need for continued theoretical refinement, evidence-based instructional design, and supportive policy frameworks to ensure that technology enhances educational quality and equity in diverse learning environments.