It is widely used in schools that serve children with special needs and learning difficulties. Our low-cost membership program expands the free content to include animated songs, mathematics, and reading activities spanning K-3. Membership also supports the production of new books, songs, educational games, and movies. Zhang L, Huang J, Liu L. Improved Deep Learning Network Based in combination with Cost-sensitive Learning for Early Detection of Ovarian Cancer in Color Ultrasound Detecting System. J Med Syst 2019; 43 ( 8 ): 251 . Crossref, Medline, Google Scholar; 17. Al-Karawi D, Al-Assam H, Du H, et al.