Transit symbols surround the bank number.
 Amount symbols surround the cheque amount.
 On-us symbols surround the cheque sequence number. An on-us is also used after but, oddly, not before the account number.
 Dashes just break the fields up to make them more human-readable.

Canadian Cheque Numbering	American Check Numbering
First comes the optional sequence number, then the bank transit number, then the bank institution number, then the branch/account, then the amount.	First comes the routing number, then the sequence number, then the account number, then the amount. Often you will see another more logical pattern: routing number account number sequence number

There is no standard check-digit scheme.

You can buy magnetic ink for ink-jet printers and software to print cheques from G7 Productivity. You can buy magnetic ink for laser printers from many suppliers.