This medium worksheet steps up the challenge with nine fill-in-the-blank sentences and a four-pair matching activity. Part A asks first graders to label words such as 'teacher,' 'river,' 'Ben,' 'Main Street,' 'Ohio,' and 'book' as common or proper nouns, and to recall that proper nouns always start with a capital letter. Part B is a matching block that pairs 'dog,' 'Emma,' 'lake,' and 'Dallas' with descriptors like 'common - animal,' 'proper - girl name,' 'common - place,' and 'proper - city.' The matching format pushes students to justify their choice rather than guess.