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Welcome to Althoff Catholic High School! Established in 1964, Althoff has built a great tradition of developing the talents and passions of our students in a small, family-like environment. We work to develop the body, mind, and soul of the whole child.

Our hope is that by developing a rigorous curriculum, it will serve as the foundation of a lifelong passion for learning. Our goal is to challenge students to make meaning of what they are learning and to guide them to become self-advocating problem solvers. We do so by using researched-based instructional strategies to empower students to take charge of their own learning and encourage them to ask the tough questions that lead to deep understanding.

We are called by Jesus Christ to educate students, in the Catholic tradition, to lead successful, faith-filled lives and aspire to achieve their personal best in all they do. 

Our entire school of faculty, students, administrators, trustees, parents, and alumni work together to ensure that Althoff is a flourishing community, diverse in perspectives and backgrounds.

We invite you to visit our campus and see for yourself what makes Althoff Catholic so special.

Leadership Team

Dr. Sarah Gass - Principal

It is my pleasure and honor to serve as Principal of Althoff Catholic High School. 

This is the start of my fifteenth year in education.  My career began at O’Fallon Township High School District as a mathematics teacher. I then had the opportunity to serve as the Principal of Chester High School and Assistant Principal of Curriculum and Instruction at Quincy Senior High School.

My husband Chris and I have been married for fifteen years and have three kids. Our family loves to go outside to camp, swim, and waterski.

As Principal of Althoff, I am dedicated to our students’ successes and will strive to continue the positive relationships, rigorous learning, and positive culture that encourages our students to celebrate their unique strengths. I view education as a lifelong process. Most importantly, I bring a belief that the students are at the center of all school-related decisions.  

I am excited to bring my experience and my child-centered approach to support our students.  

Pamela M. Schumacher - Vice Principal
  • Curriculum, Instruction, and Technology

I am happy to be a part of the Althoff family for the past 23 years and to serve as a Vice-Principal.

I have been a Catholic school educator for over 35 years and started my career at S.S. Peter & Paul School in Collinsville teaching English at the junior high level. I then had the opportunity to teach junior high at Queen of Peace School in Belleville before becoming employed at Althoff Catholic as an English Teacher and Technology Coordinator.

My husband, David, and I are both graduates of Althoff as well as each of our siblings, our 2 daughters, and our 8 nieces and nephews.

As a Catholic educator, I look to the education of the whole student. If we support a student’s faith, social and emotional development, then academic development will flourish.

The joy in teaching is seeing the successes that students experience in many different ways.

Greg Leib - Assistant Principal
  • Student Services, Discipline, and Substitute Teachers

I’ve been blessed to be part of Althoff Catholic High School for 23 years. 

I’ve been in education for 32 years. My career began at Roxana Jr/Senior High School as a math teacher, health teacher, physical education teacher, and a social studies teacher.  I’ve been in administration for 22 years. 

My wife Tammy and I have been married for twenty-five years and we have three kids. Our kids all attend Althoff and we are very involved in their extracurricular activities.

As Assistant Principal of Althoff, my goal is to build better young adults. I believe kids don’t care how much you know until they know how much you care.  Relationship building is a primary focus in helping us achieve our aforementioned goals.

I believe Althoff Catholic High School to be a special place where dreams can be achieved. 

  • Apply Today

    Our application for School Year 2021-22 is now open. Make sure to submit your application asap!

  • 8th Grade Placement Test

    Placement Testing

    Our placement test for 8th graders helps us to determine course placement in most of the core subjects; English, mathematics, and social studies. The test is required for all incoming freshmen and is offered throughout the year. After an application has been submitted, the student can select a testing time through the checklist on the Parent Portal in SchoolAdmin. 

    Upcoming Test Dates:

    • December 5 - Top scoring students will receive scholarships
    • January 20
  • Athletic Schedule

    Visit our athletic website and view comprehensive game schedules and information. 

  • Brittany McDonald and her classmates never knew the old second floor library at Althoff Catholic. The STREAM (Science, Technology, Religion, Engineering, Arts, Mathematics) Lab was up and running when they entered as freshmen. With natural talents and a passion for science and mathematics, Brittany wasted no time taking advantage of all that the school’s new Biomedical Science program had to offer.

    The nationally recognized Project Lead the Way (PLTW) curriculum taught at Althoff has shaped Brittany’s goals for the future by igniting her passion for the medical field. “These classes have opened my eyes to the many career choices in the medical field by giving me hands-on experience with some of the things I would have to do in that specific career path,” said Brittany.

    One of the most valuable lessons Brittany has learned in her PLTW classes is that there are many ways to approach a problem and that analyzing things from all sides is important. Brittany has taken Principles of Biomedical Sciences, Honors Human Body Systems, and Honors Medical Interventions in the STREAM Lab. She has enjoyed having Mrs. Leutkenhaus as a teacher and all the hands-on experiences that these classes offer.

    “Brittany is an amazing student who has worked tirelessly throughout her four years at Althoff. She has been so dedicated to the Biomedical STREAM program that she has willingly taken on the third-year course as an independent study because it did not fit into her schedule,” said Mrs. Angie Leutkenhaus. “Despite the fact that she does not hear the content presented in class, she reads through the material and perseveres through the laboratory work on her own. I am confident that her determination speaks volumes of her academic potential and success beyond high school.”

    In addition to the STREAM program, Brittany credits her work in Advanced Chemistry, Advanced Biology, Calculus, and Statistics as helping to prepare her for the classes she will take in her Chemistry Pre-Pharmacy program at Xavier University of Louisiana where she was admitted with a scholarship.

    Brittany and her family chose Althoff Catholic because they knew it would be a place that would feed her academically and spiritually, building on the strong foundation she received at Blessed Sacrament Grade School.

    Outside of the classroom, Brittany has enjoyed being part of Math Team, Varsity Cheer, National Honor Society, Rotary Club, and Saturday Scholars. Brittany has also served as an ACE Leader, a math tutor, and is a member of Delta GEMS.

    “What I enjoy most about Althoff is the people because we are like a family. No one is left out or feels unwanted,” said Brittany. “Althoff finds a way to make every single person feel included.”

    Your support of the Catch the Crusader Spirit Virtual Gala helps make the Althoff Catholic experience possible for amazing students like Brittany. Fundraisers like the gala are vital in supporting our curriculum improvements, facilities, professional development for teachers, tuition assistance, and more.

  • Austin Frazier, Althoff Teacher and Coach Recognized as a Belleville Citizen of Character by BASIC Initiative

    We are pleased to announce Austin Frazier ’04, teacher, coach, and proud Althoff alum, is one of the 2021 BASIC Initiative Belleville Citizen of Character honorees. For more than a decade, BASIC has honored Belleville citizens who help make a positive difference in the community by demonstrating character.

    From the nomination:

    A dedicated teacher, Frazier is invested in the success of his students in the classroom and in life. Frazier has a strong ability to deliver important life lessons to young people. He exemplifies integrity by speaking openly on matters of faith, virtue, and values to his students. At an all-school assembly for Catholic School’s Week, Austin shared with students that small things can make a difference, and that we never know what kind of impact we can have on another person’s day.

    In his role as football coach, the life skills for character that Austin and his staff instill in their players are plentiful. When two players recently lost a grandparent, Frazier called the team together, saying “we are not just a team, we are a family and we will get through this together”, demonstrating concern and empathy and setting the tone for the boys to support their teammates in their time of need. Frazier actively promotes responsibility and integrity, reminding players that they must carry themselves in a way which represents their school well. Frazier has an outstanding coaching staff that shares his commitment to developing young men of character and strength.

    As an alum, Frazier is deeply committed to the success of Althoff Catholic High School, often going above and beyond to promote the school.

    The awards reception will take place on November 4, 2021 at the Weingarten with a limited program and reduced attendance due to the pandemic.

    Join us in congratulating Mr. Frazier on this well-deserved recognition. 

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