This document discusses engaging prior knowledge through the use of ICT tools. It defines prior knowledge as pre-existing beliefs, experiences, and understanding that learners bring with them. Activating prior knowledge is important as it helps learners connect new content to what they already know. The document describes tools like Google Sites and Popplet that can be used to activate prior knowledge through activities like brainstorming, semantic maps, and discussion. While ICT tools can increase engagement, their use also faces challenges like technical issues, time required for setup, and eliciting incorrect prior knowledge.