Here are some useful resources where you can learn or review material that we have covered or will cover in the future.
Gramática(grammar practice & information)
www.studyspanish.com (grammar (drills and vocabulary)
https://www.spanishdict.com/textbooks
www.rae.es/ (dictionary en español)
www.spanishdict.com (dictionary & verb charts)
www.elmundo.es/diccionarios/index.html (dictionary in Spanish)
www.uni.edu/becker/Spanish3.html (Super Spanish Wedsites)
Otras fuentes (other useful sources)