Use the adjectives in comparative/superlative forms to describe your friends to

Misha is elder than me.
Andrey is the eldest in the class.

Katya is taller than Masha.
Sasha is the tallest of all.

Tanya gets better marks than Olya.
Masha is the best student in the class.

Rita is more hardworking than Ann.
Liza is the most hardworking in the class.

Tanya is more intelligent than Ann.
Mary is the most intelligent in the class.

Kirill is more patient than Dima.
Vova is the most patient in the class.

Sergey is funnier than Sasha.
Misha is the funniest in the class.