Verb (5-dan, す, transitive)
1. to grow long (e.g. hair, nails)
esp. 伸ばす
まあ、まだ爪も伸ばしてないじゃないの。Well, you haven't even grown your nails out yet.
2. to lengthen; to extend; to stretch
彼の背中を見送りながら、大きく身体を伸ばした。As I watched him walk away, I had a good long stretch.
3. to reach out; to hold out
esp. 伸ばす
手を伸ばしかけたところで出発の合図がされてしまう。Just as I was about to reach out my hand, the signal to depart was given.
4. to straighten; to smooth out
5. to spread evenly (dough, cream, etc.)
6. to dilute; to thin out
8. to prolong
9. to strengthen; to develop; to expand
というわけで、来年はその点数を伸ばせるように頑張るのだぞ。So, make sure you work hard to improve that score next year.