I will never forget this one day when Kevin was a preschooler. We had an IEP meeting, and one of his proposed math IEP goals was to be able to visualize and identify what 2 of something looks like or ...

ZA id numbers are based on a luhn algorithm validation, with the last number validating that the entire number is correct. ZA ID number is broken up into 2 digits birth year, 2 digits birth month, 2 ...