14. The system of claim 11 , wherein the portion of the companion item of content identified as body text comprises at least one of a word, sentence, or paragraph.
11. A system for aligning content, the system comprising: an electronic data store configured to store: a transcription of an item of content comprising audio content; and a companion item of textual content, wherein the companion item of textual content comprises: a plurality of paragraphs of body text, and matter other than body text; and a physical computing device in communication with the electronic data store, the physical computing device configured to: identify, in the transcription, a portion of the transcription that includes text also included in a portion of the companion item of textual content; determine a level of correlation between words in the portion of the companion item of textual content and words in the portion of the transcription; determine that the level of correlation satisfies a threshold value; in response to determining that the level of correlation satisfies a threshold value, identify the portion of the companion item of content as body text; identify a second portion of the companion item of textual content that does not satisfy the threshold value with respect to any portion of the transcription; determine that the second portion of the companion item of textual content that does not satisfy the threshold value is back matter based at least in part on a determination that the second portion of the companion item of textual content that does not satisfy the threshold value appears within the companion item of textual content after a last portion of the companion item of textual content for which a corresponding portion of the transcription is identified; and generate content synchronization information that identifies (a) portions of the audio content that correspond to body text of the companion item of textual content and (b) further identifies the matter other than body text in the companion item, wherein the content synchronization information indicates that the matter other than body text in the companion item does not correspond to the audio content, wherein the matter other than body text includes the second portion of the companion item of textual content determined to be back matter, wherein the content synchronization information indicates that the portion of the companion item of textual content, excluding the matter other than body text, should be presented in synchronization with a portion of the audio content that corresponds to the portion of the transcription.