This survey out of the UK reflects with what we see here in the US:
"Eight out of 10 teachers are concerned about the effect that the “hidden hours” spent working behind the scenes are having on their health. Research conducted for TES found that over two-thirds of the primary and secondary school teachers surveyed had sacrificed at least one night’s sleep over the past three months in order to complete all their tasks."
We do need efficient ways to do things. This page has some great ideas about how to handle teaching furstrations, mental health as a teacher, and the collections that you can use to plan your lessons.