Teaching
Dr Johnston has a strong commitment to education. He has taught at both tertiary and secondary level at:
- The University of Melbourne
- Monash University
- Deakin University
- University of Canberra
- Swinburne University
- Leibler Yavneh College
- Yesodei Hatorah College
- The Florence Melton School (Bialik College and The Jewish Museum of Australia, Melbourne)