Kjos first became aware of New Age and occult influences in our society at a 1974 conference on holistic health. As a registered nurse, she was interested in methods of healing, but soon discovered that the occult powers found in New Age methods brought bondage instead of true healing. As a parent, Kjos became aware of similar New Age influences in education. She began to monitor the schools for classroom programs that taught occultism and New Age spirituality, then began to share what she learned with other parents and teachers.

Kjos has given workshops and seminars at conferences such as the Association for Christian Schools International and CHEA. She has spoken at conferences for such groups as The Steeling of the Mind, The Constitutional Coalition, Child Evangelism Fellowship and Concerned Women for America.

Kjos' book, Brave New Schools, surveys the scene in today’s public schools and provides guidelines for parents who are concerned about their children’s education. Kjos shows how myth, feeling, imagination, and politically correct stories are replacing truth, facts, logic, and history in the classroom. She also explains what programs such as Goals 2000 are all about, and why all students-even homeschoolers-eventually will be required to demonstrate competence in the new social and thinking skills before they can move on to higher education or jobs.

Kjos is also the author of A Twist of Faith, Your Child and the New Age, and A Wardrobe from the King. Her articles have appeared in magazines such as Virtue, Moody, Servant, Focus on the Family, and the Christian Conscience. Kjos has also written numerous Bible study guides, booklets, and devotional.

A frequent guest on national radio and television programs, Kjos has been interviewed several times on The 700 Club, Point of View (Marlin Maddoux), Bible Answer Man, Beverly LaHaye Live, Crosstalk and Family Radio Network. She has also been a guest on "Talk Back Live" (CNN) and other secular radio and TV networks.