For Schools - This depend on the person. If you are early workers and wake up at 6am and reach home at 7pm then this is not an issue. But if you need to sleep until noon school will give you what we called Noise Sha. If it is always jam it will also cause Sha Qi.
For Polyclinic - depends which side you face and the distance. If there is emergency room facing you then it is not good. People visit polyclinics are normally sad and down which again project some unhealthy Qi.
Take the main door. There are many arguments that said should it based on balcony since balcony allow the most qi to come in. But when you walk into your home you allow the most qi to come in. If balcony is the case, why many still go for tilted door.
Kua is for your personal facing directions. House luck always come first.
Cheers.