Teaching the strike zone

[Fritz]

I am all for locking in with a consistent strike zone, but how do you guys handle it when you are bouncing among age groups? I did everything from high school ball down to low division 12U this past summer and if I called a high school strike on the young guys, we'd set a record for walks!

In fact, I had one triple-header day where I had the plate for a high school division first, then switched to the bases, then finished up with a plate at a low 13U game and I have to tell you, it took me a couple of innings to adjust my zone back out for the younger guys.

Any secrets one can share to help me when that happens again (and it will, the local league supers know that I love doing the games and will fill in at whatever level they need!)?