In Level D, vocabulary from levels A, B and C is now used to extend cultural and informative vocabulary. Grammatical concepts continue to be developed to achieve a higher level of conversation, reading and writing skills. Some topics in level D are-Conoce America, Visita Espana, Visita Cuba, Visita Guatemala and more. Level D is recommended for upper lementary or middle school students who have completed level C or have had three to four years of Spanish. There are three in level D-Student Book, Workbook, Teacher's Kit and Student interactive CD Rom.