Complex sentence: It is rated by Texas Education Agency as an exemplary campus, since the 1997-1998 school year, the school has received an exemplary rating based on data from the TAAS testing and PIEMS report.
Split into simpler sentences: It is rated by Texas Education Agency as an exemplary campus. Since the 1997-1998 school year, the school has received an exemplary rating based on data from the TAAS testing and PIEMS report.