Esmeralda, la tortuguita marina (Present Tense) - One-Year Digital Student Package (FlexText® + Explorer)ISBN: 9781641591379 2020 One year subscription to Esmeralda, la tortuguita marina, Spanish, Student Edition FlexText and Explorer. Access code to subscription will be included in an email following your purchase. Students must be enrolled in a class to access the digital material. Teachers need to purchase the One Year Teacher Digital Package to create a class on the Learning Site and gain access to the digital material. (Teacher's guide, audio, and