Grounded my son for a year. Is this appropriate?

My son 14, failed math in the PSSA exams this year.
He did good in everything but math, so I told him he's going to be in huge trouble. After talking to my husband we decided to ground him for a year.
Here's a list of his punishments
No iPhone 7 Plus. ( we're putting blocks on it so he can only call family and 911 ) I'm also changing our router at the house because I know he can use Wi-Fi even tho I have his phone shut down
No Nintendo Switch
No Xbox one
No TV
No PS4
No MacBook Pro
Early bedtime of 9:30 every night
In summer his bedtime will be 8pm
He is allowed to go to Disneyland and Pompano beach with us this year, but I'm limiting the number of rides he can ride at Disney. Also he will have nothing to do on the long drive( were from Pennsylvania )
No getting the iPhone 8 in September
No birthday presents
No seeing fire works on July 4
No seeing friends
No seeing his girlfriend. I'm actually making him breakup with her
No pop
No candy
No going outside this summer. Everyday his 2 sisters aged 12 and 16 will come in his room in their bikinis and tell him how much fun they had in our brand new in ground pool.
No going to Pirates of the Caribbean in May
No lego sets in June
No girlfriends until he's 18.
Is this ok or are we too harsh?

Why don't you just call DCFS and put him in foster care for a year?

Honestly I think your making him feel like a nobody now. How do you know that his brain is even good at math to start with. You ever stop to think that he might have a mental condition where his weakness is mathematics. I actually knew 2 people that were weak in math and they had a mental deficiency because of it. Maybe he needs to be in a special class to learn mathematics or try teaching him some yourself. The answer is no.

No, I also think you should employ a corporal punishment technique. 20 lashes every other day sounds right.

Geez, why not send him to a monastery? I'd hate to know your plans if he did something actually significant, like got a girl pregnant. I mean, you can only kill him once, right?

I get it. You think that he's been distracted by all this stuff and as a result tested poorly in ONE subject. I think your response is Way out of proportion, and I don't hear anything your doing in a positive way to encourage better performance: no mention of tutoring or any other assistance.

Far far too harsh, you will kill him with that not motivate him, help him retake his exam, give him an incentive to work build his confidence, remember this all he can do is his best, i think a parenting course would be good for you or you will damage him with this

He probably will not be any more likely to pass and may simply hate you.

Woah way to harsh! A year? I'm a believer in punishment but i think thats very extreme!
Talks about the worst year of someone's life!
No, reduce the grounding to a month tops and half the list. He needs to know that the wrath of God will not fall if he fails at something that can have a negative effect rather than a positive one but he needs to know the at the same time you won't tolerate slacking off - if thats what it was. Use the month to get him a tutor and tell him he needs to buckle down but cover that with positive reinforcement also like 'i know your smart', 'i know you can do better', i know your going to do something great with your life one day', 'i know your an amazing kid who just needs to focus'. Ask him to tell you why he failed and what went wrong, maybe it was something that can be worked on together between you. But no release the shackles and reduce the sentence.
The above will not motivate him to succeed but will encourage him to fail at not just the exams but life.

Your an *** you idiot I hope your son hates you

Way to harsh just ground him for two or three weeks from his phone don't ruin his life at least he did good in math and don't make him break up or he won't make friends please stop ruining his life.