First, do your homework. Don't just say "we need new screens." Show them why. Find research that proves better tech leads to better engagement (spoiler: there's plenty). Show them examples from other schools that saw test scores improve.
Second, think long-term. That old projector you're using? It probably costs more in maintenance and bulbs than a new touch screen would over 5 years. Do the math – show them the actual cost savings.
Third, get creative with funding. Grants, donations, parent-teacher associations – there are ways to get money that aren't just from the school budget. Be the person who finds those opportunities.
Fourth, start small. Don't ask for 30 screens at once. Ask for one. Show them what it can do. Let other teachers see it in action. Build momentum.
Fifth, make it about the students. Because at the end of the day, that's what matters. When you can say "this will help our kids learn better," it's harder for them to say no.
It might take time. It might take multiple meetings. But if you're passionate about it, don't give up. Our students deserve the best tools we can give them.