ERBEY, Rachel et al.
The effects of using flashcards with reading racetrack to teach letter sounds, sight words, and math facts to elementary students with learning disabilities.
International Electronic Journal of Elementary Education, [S.l.], v. 3, n. 3, p. 213-226, aug. 2017.
Available at: <https://iejee.com/index.php/IEJEE/article/view/228>. Date accessed: 12 july 2020.