1) And gladly would learn, and gladly teach. 

2) You can't teach an old dog new tricks. 

3) Multitude of years should teach wisdom. 

4) Don't teach your Grandma to suck eggs. 

5) Never offer to teach fish to swim. 

6) Method will teach you to win time. 

7) The years teach much which the days never know. 

8) Teach your grandmother to suck eggs. 

9) Don't teach your grandmother to suck eggs. 

10) Love and business teach eloquence.

11) In education we are striving not to teach youth to make a living,(http://sentencedict.com/teach.html) but to make a life. 

12) In seed time learn, in harvest teach, in winter enjoy. William Blake 

13) Preachers can talk but never teach, Unless they practise what they preach. 

14) Thoroughly to teach another is the best way to learn for yourself. 

15) There are obviously two educationsOne should teach us how to make a living and the other how to live. 

16) She offered to teach me to crochet.

17) A teacher should entertain as well as teach.

18) The adults teach them these skills.

19) Teach others by your example.

20) I undertook to teach the children English.

21) Well[sentencedict.com], that'll teach you a lesson.

22) Don't teach fish to swim.

23) Do not teach fish to swim.

24) A stupid fellow is difficult to teach.

25) Adversity does teach who your real friends are.

26) I'll teach you from A to Z.

27) The Argentine debacle has important lessons to teach.

28) I am not qualified to teach this subject.

29) Learn to suffer without complaining; that is the best thing I can teach you. 

30) If democracy is to survive, it is the task of men of thoughts, as well as men of action, to put aside pride and prejudice; and with courage and single-minded devotion---- to find the truth and teach the truth that shall keep men free.