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WELCOME TO
OUR SCHOOL
St. John XXIII Catholic School (SJ23) provides a foundation of Catholic values and academic excellence for its students in preschool through 8th grade. Our faculty and staff are dedicated to building a strong academic, social, emotional, and spiritual foundation for our students.
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“I am beyond grateful for what St. John XXIII and the entire staff has done for my family. My kids would not be in the places they are if it weren’t for the dedication and love of the teachers and staff. THANK YOU ALL.”
– Current Parent
WE ARE EXCITED TO MEET YOUR FAMILY
Choosing the right educational option for your child is one of the most important decisions you will make. It’s important that your child’s school is an educational partner with like-minded values and goals, dedicated to helping your child reach his or her social, emotional, intellectual, physical, and spiritual potential. If you are interested in becoming part of our school community, we welcome you to contact us today!
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2026-2027 EXTRACURRICULAR CLUBS
Clubs meet from 3:30-4:30 PM and are held in two sessions:
Dance Club
Piano Club
Coloring & Paint-By-Number
Magic School (AI & Creativity) Club
Construction (LEGO) Club
Early Childhood Building Club
Introduction to 3D Printing
Wild Card Club
Board Games
Sign Language
Sole Mates | Walking Club
Why St. John XXIII Catholic School?
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19 Days to Go! What’s still on your Summer Bucket List?
Beach day? Ice cream? Camping? Sleeping in?
Whatever is on your list, SOAK IT UP—we’re just 19 days away from seeing our Phoenix family again!
Please help us welcome three new members to the St. John XXIII Catholic School family! We are so excited to welcome them to our team for the 2026–2027 school year!
Mrs. Danielle Schulze | K3 Teacher
Mrs. Schulze brings 19 years of experience in early childhood education to St. John ...XXIII! She earned her Bachelor’s degree in Early Childhood Education, with certifications in both Regular and Special Education, from UW-Whitewater and her Master’s degree from Cardinal Stritch University. She is passionate about engaging our youngest learners through meaningful, interactive experiences filled with play, art, music, and movement.
Mr. Zach Wilder | Physical Education Teacher & Athletic Director
Mr. Wilder graduated from Concordia University Wisconsin in 2025 with a bachelor’s degree in Exercise Physiology. After gaining experience teaching at Nativity Jesuit Academy, he knew how much he loved building relationships with students and creating a positive, energetic environment through physical education and athletics. We are thrilled to have his enthusiasm and energy joining our Phoenix community!
Mrs. Sarah Lindauer | Special Education Liaison
Mrs. Lindauer joins us with a strong background in both elementary and special education. She earned her degree from UW-Eau Claire and has experience teaching early childhood, elementary, and special education. Most recently, she designed and launched a Special Education Program and Special Needs Scholarship Program at St. Mary Parish School. Sarah has a passion for supporting students with diverse learning needs and celebrating their individual growth and success.
Please join us in giving Danielle, Zach, and Sarah a BIG Phoenix welcome! We are blessed to have them joining our school family and can't wait to see the difference they will make in the lives of our students.
Welcome New Families! We are excited to welcome all of our new students and families joining St. John XXIII Catholic School this year. Whether you're joining us in Pre-3, Kindergarten, Middle School, or somewhere in between, we're honored that you've chosen SJ23 as your educational ...home.
Here, you'll find:
📚 Strong academics
✝️ Faith-filled learning
🤝 A supportive community
❤️ Opportunities to serve, lead, and grow
Current SJ23 families, help us extend a warm welcome by sharing a greeting in the comments! We can't wait to begin this journey together.
RSVP or Sign Up to be a Chef Today! It was such a wonderful event last year and we are so excited to bring it back! https://stjohn23rd.ccbchurch.com/goto/forms/398/responses/new
A huge thank you to our summer CRE students and Mr. Chilinski! With their help, over 92 pounds of produce was donated to the Food Pantry! Potatoes, tomatoes, zucchini, kale, swiss chard, and a variety of herds were all harvested!
We're Looking for a Volleyball Coach!
Do you have a passion for volleyball and enjoy working with students? St. John XXIII Catholic School is looking for a 6th/7th Grade Girls Volleyball Coach for the upcoming season! This is a wonderful opportunity to make a difference, build confidence, ...teach teamwork, and help our student-athletes grow both on and off the court. Interested or know someone who would be a great fit? Please reach out to zwilder@stjohn23rd.school for more information.