This isn't something you can realistically do "in house". You can't have the Head Teacher swot up on some leadership textbooks and then deliver life-changing management training. It will be trite, transparent and all impact will disappear without trace.

Instead, try to articulate the cost to the business over the next 24 months of *not* doing the training. Anything you spend that turns out to be less than that is therefore money well spent.

Having said that, you should get in touch with local training providers. The European Social Fund is still running, so there is funding for qualifying businesses (including small charities!) to get access to funded training at no more cost than losing attendees from the business for a day a week for however long it takes to complete the course. ILM (Institute of Leadership & Management) courses at Levels 2, 3 and 4 are great to equip middle managers with some fundamental tools to manage more effectively and you can then think about more tailored training once that has bedded in and you get some useful feedback from your management team.

Not sure if you've looked at (or can access) ISQAM courses via HMC? We put five of our middle managers through level 1 last year, and they've really appreciated it. Two have gone on to level 2 this year and another two intend to. I'd have a look if you can.