From College Board
"SAT Score-Use Practice Descriptions
SAT Score-Use Practice
Highest Section Scores Across Test Dates — Version 2
(Highest M, CR, W)
<University X> has indicated that it considers your highest section
scores across all SAT test dates that you submit. Only your highest
section scores will be considered as part of the final admissions
decision. Each time you submit scores, <University X> will update your
record with any new high scores.
<University X> strongly encourages you to submit your scores each
time you take the SAT. Sending your scores each time you take the
SAT can benefit you by allowing <University X> to consider you for all
available enrollment-related opportunities."
Lehigh Super Scores SAT , don't know about ACT , but I think most schools don't super score ACT