7. A computer-implemented method comprising: under control of one or more computing devices configured with specific computer-executable instructions, identifying a first corresponding word, wherein the first corresponding word occurs in both an item of textual content and in an item of audio content; identifying a second corresponding word, wherein the second corresponding word occurs after the first corresponding word in both the item of textual content and in the item of audio content; identifying a third corresponding word, wherein the third corresponding word occurs after the second corresponding word in both the item of textual content and in the item of audio content; causing a synchronous audible and textual presentation of the first corresponding word; causing a textual presentation of the second corresponding word without synchronously audibly presenting the second corresponding word; prompting a user to speak the second corresponding word; obtaining a spoken response as audio input; determining that the spoken response includes the second corresponding word; and in response to determining that the spoken response includes the second corresponding word, causing audible presentation of the third corresponding word.
7. A computer-implemented method comprising: under control of one or more computing devices configured with specific computer-executable instructions, identifying a first corresponding word, wherein the first corresponding word occurs in both an item of textual content and in an item of audio content; identifying a second corresponding word, wherein the second corresponding word occurs after the first corresponding word in both the item of textual content and in the item of audio content; identifying a third corresponding word, wherein the third corresponding word occurs after the second corresponding word in both the item of textual content and in the item of audio content; causing a synchronous audible and textual presentation of the first corresponding word; causing a textual presentation of the second corresponding word without synchronously audibly presenting the second corresponding word; prompting a user to speak the second corresponding word; obtaining a spoken response as audio input; determining that the spoken response includes the second corresponding word; and in response to determining that the spoken response includes the second corresponding word, causing audible presentation of the third corresponding word. 9. The computer-implemented method of claim 7 further comprising: prior to obtaining the spoken response as audio input: receiving an initial spoken response as audio input; determining that the initial spoken response does not comprise the second corresponding word; and providing a hint regarding the second corresponding word.