A comparison of the perceptions of technostress experienced by teachers versus technology used by teachers in elementary education in a southeastern school district
I'm not sure whether these are just what you need, but might be worth looking at; they are not about school teaching:
Tarafdar, M., Tu, Q., Ragu-Nathan, B. S., & Ragu-Nathan, T. S. (2007). The impact of technostress on role stress and productivity. Journal of Management Information Systems, 24(1), 301-328.
It might be worth contacting the authors of this conference paper:
Agogo, D., & Hess, T. J. (2015). Technostress and Technology Induced State Anxiety: Scale Development and Implications. Thirty Sixth International Conference on Information Systems.
Burke, M. S. (2009). The incidence of technological stress among baccalaureate nurse educators using technology during course preparation and delivery. Nurse Education Today, 29(1), 57-64.
https://www.researchgate.net/publication/23163270
Very best wishes,
Mary
Article The incidence of technological stress among baccalaureate nu...
Article The Impact of Technostress on Role Stress and Productivity
Conference Paper Technostress and Technology Induced State Anxiety: Scale Dev...