Meet the Leaders of Learning for our Raven Learning Community

Our Science & Project Lead the Way Teachers

  • Ms. Julia Fleischer
    Science Learning Leader

    Ms. Julia Fleischer is passionate about science education and has taught science now for 4 years.

    She has a Bachelor of Science Degree in Biology, Minor in Chemistry, and a Biotechnology certification from CU Denver. She went on to get her Masters of Science in Teaching and learning through CSU-Global and did the teacher certification program through Western State University. With all of that education, she finds it amazing to still get to learn something new every day from her students!

    She loves her family time camping, reading, watching movies, and hanging out with her 2 sons and husband. She is ecstatic to be part of the Riverdale Ridge High School Science team.

     Mr. Guengerich Picture
    Mr. Mark Guengerich

    PLTW Engineering & Science Learning Leader

    Mr. Guengerich (Mr. G) has taught at Brighton High School since 1998 and is pleased to now join the RRHS team.  He grew up in the Upper Peninsula of Michigan and north-central Indiana.  Before coming to Colorado he taught at Shahse River School in the Republic of Botswana for 3 years and at Goshen High School in Indiana for 3 years.  He loves to travel and spends most of his free time enjoying his family, including occasional camping trips.

      Picture Mrs. Phibbs

    Ms. Tina Phibbs
    Teacher Lead Learner/Science & PLTW Biomedical 

    Mrs Phibbs is so excited to be a part of the Riverdale Ridge Community. She can’t wait to share her love
    of science and adventures with her students.

    Mrs. Phibbs grew up in Greeley, Colorado. She earned her Bachelor of Science degree from Colorado
    State University, her secondary science teaching license from the University of Northern Colorado, and
    her Master’s Degree in Curriculum and Instruction from the University of Colorado at Denver. She
    began her teaching career in the Jefferson County schools teaching at Arvada High School and Everitt
    Middle School for 6 years. She took a leave of absence from teaching for 5 years to be a stay at home
    mom to her 3 children.

    Mrs. Phibbs is currently in her 15 th year of teaching in District 27J. She helped open Pennock K-8, Prairie
    View High School, and Prairie View Middle School. She is currently teaching 8 th grade at PVMS.
    Mrs. Phibbs has been married for 25 years and has 3 children ages 23, 21, and 19. She also has 2 dogs, 2
    cats, a chinchilla, and a turtle. Mrs. Phibbs has also been a gymnastics judge for the past 29 years. She
    also enjoys traveling, running, hiking, theatre, and spending time with her family.


Providing a safe, supportive, and challenging learning community for ALL students to THRIVE!