Final answer:
Phonics instruction is the best approach to help Jenni with her reading difficulties, as it addresses foundational decoding skills, which are critical for differentiating between long and short vowels effectively.
Step-by-step explanation:
The best teaching format to remediate Jenni's difficulties with reading, considering she confuses long and short vowels and her DIBELS NWF score was 37, would be 1) Phonics instruction. Phonics instruction will address her fundamental issues with decoding by teaching her the relationships between letters (graphemes) and their sounds (phonemes). Through explicit and systematic phonics instruction, Jenni can learn to identify and utilize vowel sounds correctly, which is crucial since her reading difficulties include confusion with vowel sounds. She will practice sound-letter correspondence that may help her understand patterns in words that lead to more accurate and fluent reading. Additionally, exemplifying with relevant words, such as those in the review, helps illustrate the importance of vowel sounds in reading fluency.
In contrast, while sight word instruction helps recognize words quickly and with little effort, it doesn't address her issues with phonemic awareness and decoding. Phonics is preferred here since Jenni's problem seems related to decoding words rather than recognizing them by shape, as is sometimes the case in dyslexia. Fluency instruction and comprehension instruction would come into play once Jenni has a better grasp on decoding words; fluency would help her read more smoothly, and comprehension strategies would enhance her understanding of what she reads.