A fourth study of the impact of classroom assessment practices on students and their learning in the context of the classroom was undertaken by Bangert-Drowns, Kulik, and Kulik (1991), who investigated the effects of frequent classroom testing.
A hyphen (-) is a punctuation mark used to join the separate parts of a compound word. A hyphen is a joiner. A hyphen is used to join the words of a compound adjective (e.g., five-page document), to join the words of compound noun (e.g., cooking-oil), and to join a prefix to a word (e.g., re-examine).
  A single dash used to connect two words to create a compound word. A hyphen is like a dash. It is used when writing numbers (like forty-two) or in words such as mother â¦ -in-law, ex-wife, and president-elect. Often, it is hard to say whether or not a word is hyphenated.