Your choice of exercises...not bad, I suppose.
Your actual layout...not great.
For one, there is no way a "technique day" with athletes being told to "use 50% of what you could use" is going to work in practice. Kids will never adhere to that, even if they're supposedly going to repeat the same workout the next day with "real weight." If you have to train Mon/Wed/Thu you would be much better suited to split the exercises for Wed/Thu into an upper/lower split or changing this to a push/pull/legs setup.
I have a bunch more whiny criticisms, but honestly, just go read the Wendler article and adjust from there.