It seems schools may not be providing an opportunity for chi

It seems schools may not be providing an opportunity for children to re-express their ideas and ...
It seems schools may not be providing an opportunity for children to re-express their ideas and so have them tested and refined by teachers and their peers.请帮忙仔细分析这个句子.请问may be doing和maybe do是一个意思吗?这里为什么要用may not be providing呢?