So I told him on the phone he was going to be grounded when he got home and to apologize for swearing and lying.
I've decided he will spend his day cleaning, when he is done with his regular chores I will find things to keep him busy (extra cleaning). I'm contemplating also not allowing snacks (usually junk food, I'm not denying him healthy food but the kids are allowed some teddy grams after school, a cookie after dinner etc) since he will be grounded. He is usually pretty good in school as we have stressed the importance, and I feel a strict punishment is necessary to set a precedent.
He is in kindergarten. Do you think this is too harsh? I honestly don't. He knows better. I think it will be more effective than taking away his ds, etc. School is extremely important to us, as is HONESTY, and not only did he purposely push limits but he lied, and about me, too.