at school my home email is not available and it is login with google so i have to use 2 accounts for home and school. Is this considered cheating?

https://support.chess.com/article/596-can-i-have-multiple-accounts

Can I have multiple accounts?

YES, Chess.com now allows each member to have TWO accounts, with approval from support. Without support approval noted on the account, this is still considered cheating. If it's just a new username you are after, please see here. 

There are many reasons you may want a second account. Some people prefer to test out new openings on an account where they don't have to worry about their rating, or you may want to keep certain games private. Or you may want an account just to play on when it's late at night and you're tired. Or any number of reasons! But there are also things you should NOT do on your second account. 

If you have two accounts, you may NOT:

• Play the accounts against each other, even in unrated games
• Play or spectate in the same vote chess game with both accounts
• Play or spectate in the same 4 player chess, or other variant game with both accounts
• Play in the same tournament with both accounts
• Comment with both accounts in the same forum thread or discussion
• Use the account as a 'speed run' account
• Create the second account with a much lower rating than your main account

Other things to be aware of: 

Memberships do not transfer to the second account. If you want to access your membership on both accounts, you must pay for it on both. 

If you break the rules on one account, both accounts will be affected- If you are abusive on one account, and get muted, both accounts will be muted. If one account is closed for cheating, the other will also be closed. 

Any attempt to coordinate both accounts in order to abuse, harass, or upset another member will lead to both accounts being closed. 

In some special cases a third account may be allowed. If you are requesting a third account, please write to support before creating the account, and before using the below form. Note that third accounts are much less likely to be approved. 

If you want a second account, you may create one now. But before you use the second account for anything, you must request the account be approved for use.

When creating your account, please select a starting experience level as close as possible to your true rating: 

New to Chess = 400, Beginner = 800, Intermediate = 1200, and Expert = 1600 

If your rating is over 2000, please note this in the form below. 

For your second account to be approved for use you must use this form to request support for approval: 

If you are a Titled player please use the Titled Verification Form to request your alternate account.

If your account has been closed due to a Fair Play violation and you want to apply for a new account, please instead use the New Account Application Form here.