The original Classification of Matter Card Sort with 222-cards to sort! If your students do not yet understand how matter is classified, they certainly will after this hands-on activity! I am especially proud of this activity and wish I had it when I was learning to classify matter.You have the flexibility to choose the depth to which your students classify matter:pure substances,mixtures,elements,compounds,homogeneous mixtures,heterogeneous mixtures,metals,non-metals,metalloids,inorganic comp