When Will and Carlton are in the principal's office, Will's tie goes from being tucked into his pants, to out, and then back in multiple times.
It's stated that Carlton scored a 114 on the PSAT and Will scored a 116 putting them in 90th and 91st percentile respectively. In 1991, when this episode aired, the PSAT was scored with 80 points possible in 3 sections (reading, writing, and math) for a total possible score of 240. 114 & 116 would not have been anywhere near 90-91 percentile.