- It does not pay enough.
- They are concerned about facing false accusations of child abuse.
These problems are easily solved with a bit of political will.
First of all, let's deal with the paedophile panic.
Teachers accused of child molestation will be granted anonymity until a verdict is reached. Cases have to be dealt with quickly, within say, two months. The teacher will be suspended on full pay until the verdict is reached. Falsely accused teachers will be reinstated at once, and their name will never appear in the media.
Children who are found to be making malicious false accusations against teachers will be dealt with extremely harshly, as will their parents also. Both the child and the parents will face possible fines, incarceration, unpaid community work and then social services intervention in the family. The child will not face exclusion from education, only transfer to a harsher regime. Once there is no more incentive to make false accusations, these will stop.
Secondly, money. How can we attract more men to become teachers? Simple. Use market forces. I work in the private sector. If you want to hire a project manager, and no-one applies for the job, increase your offer until someone applies.
If there are too many women teachers and not enough men, the answer is simple. Pay men more than women. Let's say we pay male teachers 35% more than female ones, until further notice. That should do it.