I was teaching English in a primary school and helping in an orphanage in Chitwan. The work in the orphanage included helping kids with homework, weeding in the garden and helping in the kitchen. Overall, the experience was very positive. While teaching in the school is far from easy (kids and disobedient), you can feel it is valuable for them: local teachers don't teach English well. Helping orphans with homework also requires some patience but in return you can feel their love.
In the evenings I organized computer classes for kids using my small laptop. And the best memories are from doing handicrafts from paper with them on Christmas Eve.
The host family was from middle or even upper-middle class with good facilities. They were super friendly and treated my like their own daughter. Very tasty food. Only small disadvantages were frequent electricity outages, absence of hot shower and quite low temperatures in the room at night, but those are realities of Nepalese life.
The only improvement points for RCDP are to improve communication with the local school. The teaching hours were not from 10 to 4pm as RCDP told me but from 10 to 1pm. Also, I wasn't informed the school would have 10 days of exams and holidays during my stay, when I wasn't needed and had to do gardening work instead of teaching.