The best anchor script for the farewell party at school / university :

Start with something that talks about memories, beautiful school days or something that wishes everyone a bright future ahead.

Eg lines of the famous song 'hum rahen ya na rahe kal, yaad ayenge ye pal' '. Take the main lines.

In the middle- You can kinda over any favourite teacher (not personal, consider the whole class / majority). These are a liner between the performances.

Other fillings- 
A. any highlight of your school life. Or any memory you'll never forget.

B. any quote (it does not have to be a complex English quotation, choose a Hindi or an English simple, but make it CLEARLY INDERSTABLE for everyone.

C. If allowed, you may go to the public and ask your principal to tell you something about the batch that passes.

PS I do not know if this would be very helpful since I am late to respond. He was caught up in some work.