• May

    Valedictorian & Salutatorians

    St. John XXIII is proud to announce the class of 2019 valedictorian, Caitlyn Louise Cano and salutatorians, Abby Faye Hollman and Adley Grace Marsh.
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  • All Student Physicals

    All students must have a physical that is signed by a physician for the 2019-20 school year. 
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  • Uniform SALE!

    Mills Uniform 2019 Summer Sale starts on June 8. 
    10% Off everything / 25%+ and More Off Clearance items and $5 shipping on orders $100+ placed during the sale.
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  • Cheer Team Celebrates

    The SJ23 cheer team competed in the Cheer America Platinum Championship at NRG Center on Saturday December 1, 2018.
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  • April

    Senior Art Show

    Saturday, May 4, 2019 - 10AM - 12PM Senior art students will showcase their skills in the Little Gallery at The University of St. Thomas in Houston.
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  • SJ23 Art Car Wins

    The Treasure of Smaug won 3rd place over all in the Art Car Parade! 

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< 2019
Parare Mente et Corde

St. John XXIII College Preparatory

1800 W. Grand Parkway N., Katy, Texas 77449
Fax: 281.693.1001

Our Mission
We prepare the hearts and minds of our students to serve God and others.