Lesson planning: too time-draining for 2026

My girlfriend is a primary school teacher and I had no idea how much work goes into lesson planning every week until I actually watched her do it I'm a software developer. I know little about teaching (My Masters project involved a pedagogical aspect which involved some research in the area). But I've spent a lot of Sunday evenings watching my girlfriend at the kitchen table making slides, printing worksheets, writing lesson plans, and I started getting curious about what was actually taking so long. So I asked her to walk me through it. Turns out the actual lesson content isn't the hard part. It's everything around it. Making slides that don't look terrible. Creating a worksheet that matches what she's covering. Writing an exit ticket. Then doing it all again next week for a completely different topic. It struck me as the kind of repetitive work that probably shouldn't take as long as it does in 2025. For those of you who do this every week, what's the bit that actually drains you the most? And what have you tried that's actually helped, even a little? Not selling anything, but I have been working on a side project aimed at helping my girlfriend with this, would love to hear a wider scope of tea her perspective on your pain points around this.