These are a great tool for practicing and learning vocabulary! I use them every week as a review of the new concept words and as a fun group activity that my kids look forward to, and give small prizes to the team that correctly matches them first! It gives the students and opportunity to manipulate and discuss the vocabulary and seems to really help their overall understanding and recall of the words. You could even shrink them and have the kids match them up and glue them into their Interactive Notebooks. Science Rocks with Smalley!