Irregular verbs can really make a teacher feel out of sorts. If you have a student who says “She sitted in my seat”, then you’re at risk for this irregularity. Here are some websites I’ve found that may be just what the doctor ordered! Feel better soon!
http://www.eslgamesplus.com/past-simple-irregular-verbs-esl-grammar-interactive-activity-online/
http://www.firstschoolyears.com/literacy/sentence/grammar/verbs/interactive/irregular.htm
http://www.marks-english-school.com/games/b_past.html
http://www.macmillandictionary.com/us/verb_wheel/