Lutheran Interparish School
Our Faculty and Staff
2021-2022 School Year
Mr. Mark Grewe, Principal
Mr. Mark Grewe has been at LIS since the summer of 2011. Mr. Grewe is a 1981 graduate of Concordia, River Forest, with a concentration in youth ministry and early childhood. Mr. Grewe received his Masters in Education from Indiana University and his Administrative certification by taking post-graduate work at Concordia. Mark met his wife Jean at Concordia River Forest. Jean taught in the Lutheran School system for for 25 years. She currently works at Grantwood AEA in Cedar Rapids as a Paraprofessional. Mark and Jean have three children: Nathan, Sarah, and Rachel. Nathan is a LCMS pastor and is married to Mindy living in New Jersey. They are blessed with four children: Makenzie, Ashley, Alexander, and Danielle. Sarah is Social Worker and is married to Travis Jansen and they reside in East Moline, Illinois. They are blessed with two daughters, Sophia and Eve and two sons, Gabriel and Silas. Rachel has a Business/Communication degree and is employed by the River Bend Food Iowa and resides in East Moline, IL.
Favorite Bible Passage: Psalm 118:24
Mrs. Monica Miller, Administrative Assistant
Monica Miller has lived in the Williamsburg area all of her life. Her and her husband, Brad live outside of Parnell and operate a Classic Auto Restoration business. They have a daughter, Chelsea, who works for Midwest One Bank and a son-in-law, Spencer, who teaches History in the Ottumwa High School. Monica enjoys gardening and taking their old trucks to various car shows across the state.
Favorite Bible Passage: Isaiah 41:10
Mrs. Jodi Van Etten, Preschool Teacher
Mrs. Jodi Van Etten is currently the Preschool Teacher at LIS and has been since 2006. Jodi graduated from the University of Northern Iowa in 1993 with a double major in Elementary Education and Early Childhood. She taught two years of Kindergarten at Ackley-Geneva, 3 years of third grade at Knoxville, Iowa, and did in-home daycare for seven years before teaching at LIS. Jodi is married to Mike (since 1992), and they have been blessed with 3 boys: Dillon, Dalton & Cooper.
Favorite Bible Passage: Philippians 4:13
Mrs. Monica Long Preschool 3 & 4 - Teacher Aide
Monica Long graduated from Mount Mercy University, Cedar Rapids Iowa, in 2011 with a BA in Fine Arts and a BA in Social Work. She began at LIS in 2019 as Preschool Assistant. Monica and her husband Tony have four children; James, Henry, Thomas and Lily. In her spare time, she enjoys spending time with family and friends.
Favorite Bible Passage: Proverbs 22:6 “Train up a child in the way he should go, and when he is old, he will not depart from it.”
Mrs. Jennifer Rethwisch Kindergarten Teacher
Mrs. Jennifer Rethwisch is married with four children; two who currently attend LIS, and two alumni. She and her husband Pastor Stewart Rethwish are members of St John, Victor and are both huge supporters of Christian education and LIS. Jen loves to volunteer at various functions at the school when she is able. Her hobbies include; cooking, baking, entertaining, camping and quilting in her spare time.
Favorite Bible Passage:
Mrs. Rebecca Sitas, First Grade & Music Teacher
Mrs. Rebecca Sitas attended and graduated from Concordia University, River Forest (CUC) with Bachelor degree in Elementary Ed., with a minor in music. Her first call was to Holy Ghost Lutheran School in Monroe, MI. She taught second and/or third grades there from 1997-2007. Mrs. Sitas also coached the JV volleyball team, directed hand bells, children's choir and yearly musicals. She received her Master of Reading Degree from Eastern Michigan University in 2003. The Sitas family moved to Williamsburg in 2007...teaching music at LIS since then. Mrs. Sitas and her husband Bill, have three daughters: Kathryn, Naomi, and Leah. In her spare time Mrs. Sitas enjoys singing, playing flute and recorder, reading and spending time with family.
Favorite Bible Passage: Jeremiah 29:11
Mr. Bill Sitas, Second Grade Teacher
Bill is currently teaching second grade at LIS. He graduated from Concordia, River Forest in 1997. He received a masters in education from Marygrove College in 2003. Bill received his masters in school leadership from the University of Iowa in 2011. Bill has taught many levels, including 2nd and 5th - 8th grades at Holy Ghost Lutheran School in Monroe, MI. Bill served at LIS from 2007 - 2010 as principal. He was the director of child care at the University of Iowa while working for Bright Horizons. Bill and his wife, Becky (1st grade teacher) have three children, Kathryn, Naomi and Leah.
Favorite Bible Verse: Hebrews 4:16
Mrs. Peggy Grimm, Third Grade Teacher
Mrs. Peggy Grimm began her ministry at LIS during the 1978-1979 school year. Mrs. Grimm is a 1978 graduate of Concordia Teachers College Seward,NE. She and her husband Lyle has two children; Jason and his wife Hannah who live in Coralville and Brittney who lives in Des Moines. Mrs. Grimm and her husband Lyle are members at St. Paul Lutheran church in Williamsburg, IA. Mrs. Grimm enjoys watching NE football ,golfing and gardening.
Favorite Bible Passage: Proverbs 22:6
Mrs. Robyn Schaefer, Fourth Grade Teacher
Mrs. Robyn Schaefer teaches 4th grade at LIS. She began teaching in the fall of 1979 after graduating from Concordia, Seward. She taught at Trinity Lutheran School in Cedar Rapids for twelve years before coming to LIS in 2000. Her husband, Bill, sells insurance for Farm Bureau in Williamsburg. They have one son, Ryan, who works for Reinhart Tiling, and daughter-in-law Lauren who is also a teacher.
Favorite Bible Passage: Jeremiah 29:11
Mrs Shelly Shaffer, Fifth Grade Teacher
Mrs. Shelly Shaffer is currently teaching 5th Grade at Lutheran Interparish School. She graduated in 2001 from Mount Mercy College in Cedar Rapids, Iowa, with a BS in Elementary Education and endorsements in K-8 Reading and K-8 English and Language Arts. After substitute teaching for two years, she began her work at LIS in 2003, as the Fifth Grade teacher. Shelly completed the Concordia Colloquy program in 2007 to receive her Lutheran teacher certification. Shelly and her husband Donnie, have three children, Camden, Lauren and Hunter.
Favorite Bible Passage: Phillipians 4:13
Mr. Andy Armbrecht, Sixth Grade Teacher
Mr. Andy Armbrecht has taught at LIS since 1989, first in fifth grade, and currently in sixth grade. He is co-athletic director and also teaches upper grade PE. Mr. Armbrecht graduated from Concordia College I Seward, NE, in 1989. He and his wife have four children: Isaiah, Emma, Lydia, and Simeon. His interests include reading, sports, gardening/ outdoors, the Iowa Hawkeyes, and vocal music. Mr. Armbrecht is a member of St. John Lutheran Church, Homestead.
Favorite Bible Passage: John 14:6
Mrs. Linda Wille, Seventh Grade Teacher
Mrs. Linda Wille graduated from the University of Iowa in 1989 and taught at Tri-County Schools for 10 years. Then she came to LIS in 2000. She earned her colloquy from Concordia University in Seward, NE in 2004. Mrs. Wille and her husband, Jeff, are blessed with 4 children. Sarah and Nathan were born in 1995. Tyler and Kaitlin were born in 2001. Much of Mrs. Wille's time is spent going to her children's activities. She also enjoys traveling, reading and spending time with family and friends.
Favorite Bible Passage: Jeremiah 29:11
Mrs. Elyse Wilde, Eight Grade Teacher
Mrs. Elyse Wilde was born and raised in southern Minnesota and attended a Lutheran school from Preschool through eighth grade. She then attended a local public high school. She graduated from Concordia University, in Seward, NE in 1994 with a degree in Secondary Education. She began teaching in 1995 and taught in both MN and AZ before starting at LIS in 2004. In 2010 she earned her Middle School Endorsement through Viterbo University. She is married to Shawn and has one son, Ian and one daughter, Aubree.
Favorite Bible Passage: Psalm 25:4-5
Mr. Neal Berry, Band Teacher
Mr. Neal Berry has taught band at Lutheran Interparish School beginning with the 2013/2014 school year. An accomplished trumpet player, Mr. Berry brings a love for music to each one of his students as he teaches them in both private lessons and in full band performance. Mr. Berry has brought our L.I.S. band program a long way during his tenure.
Mrs. Pat Nielsen, Food Service Director
Mrs. Pat Nielsen took over as Food Service Director in 2017. Mrs. Nielson is married to Bill, who is employed by the DOT. She has two sons; Robbie, and his wife, Jenna of Williamsburg and Adam andhis wife, Emily of Marengo. She has nine granddaughters.
Pat enjoys cooking, golfing and spending time with her family.
Mrs. Kristen Leib, Cook
Mrs. Kristen Lieb is a graduate of NW Missouri State University with a Bachelor of Science in Business Management. After volunteering in the kitchen for a year she became an assistant cook in 2019. She is married to her husband Josh. They have two children, Charlie and Katie. She enjoys reading, traveling, and volunteering.
Favorite Bible verse: Matthew 7.12
Mrs. Angie Reed, Cook
Mrs. Angie Reed has been helping cook at LIS beginning in the 2016-2017 school year. She grew up in Mount Vernon, IA and presently lives in rural Parnell. She and her husband, Chad, have 3 children: Amelia, Colin, and Abigail. Her children attend LIS and she enjoys working at the school because it gives her a chance to see her kids throughout the day. She enjoys watching football and basketball games with her family. Angie grew up a Hawkeye, but attended college at ISU, so she roots for both teams.
Favorite verse: Matthew 6:27
Mrs. Britney Iburg, Custodian/Maintenance
Mrs. Britney Alina Iburg has lived in Williamsburg most of her life. She is a 2007 high school graduate with over 10 years of cleaning experience. She came to the LIS in June of 2019. She married Nick in 2011 and since they have had 3 kids, Nash, Bowen, Quinn, a dog (duke) and a cat (Tiny). She enjoys working at the LIS, being outside, puzzles, and hanging out with friends and family.