Learn

1. Studyspanish.com (Stem-changers e-i and o-u)
2. Spanishdict.com ​(Stem-changers e-i and o-u)
3. Studyspanish.com (Spell-changing verbs -car, -gar, -zar verbs and "y")
4. Spanishdict.com (Spell-changing verbs -car, -gar, -zar verbs and "y")

practice

1. Stem/Spell-changing verbs combined (Conjuguemos)
2. Stem-Changers e-i and o-u (Studyspanish.com quiz)
3. Stem-Changers e-i and o-u (Studyspanish.com test)
4. Spell-changing verbs -car, -gar, -zar verbs and "y"(Studyspanish.com quiz)
5. Spell-changing verbs -car, -gar, -zar verbs and "y" (Spanishdict.com) 

Stem-changers (e-i)

Practice Stem-Changer (e-i) (Quizlet)

​STEM-CHANGERS (o-u)

Spell-changing verbs (-car, -gar, -zar and "y")