Making a study booklet for your students, though a lot of work, is really worth your time.
As is widely known these days, there is no textbook out there on the market that you can religiously stick to, as to every school, class and student being unique.
Feel free to access a range of study booklet templates here. If they are not suitable for your context, it doesn't matter! You can at least use this as a starting point.
Remember, hard work pays off, once you've made a study booklet, you won't need to make another one, and can take it with you if you decide to move on to another school.