Regular present tense:
http://www.studyspanish.com/lessons/regverb1.htm
http://www.studyspanish.com/lessons/regverb2.htm
http://www.studyspanish.com/lessons/regverb3.htm
https://conjuguemos.com/activity.php?language=spanish&id=1&source=public&type=verbs
http://www.learnspanishfeelgood.com/verbs-regular-ar1.html
http://www.learnspanishfeelgood.com/verbs-regular-ar2.html
http://www.learnspanishfeelgood.com/verbs-regular-er1.html
http://www.learnspanishfeelgood.com/verbs-regular-er2.html