Prescriptions
The ninth and eleventh anuvakas of Shiksha Valli prescribe a moral or religious way of life which a person aspiring for self realization or divine knowledge follow. Ninth Anuvak emphasizes heavily on learning, studying and teaching (Swadhyaya and Pravachana) and ordains that this should be done all through the life of an individual. According to this anuvaka, the following are the duties to be performed.
Observing truth always, observing perseverance, controlling indulgence in sensory organs or sensory pleasures(Shama), controlling external flow of mind (Dama), performing mandated vedic rituals like Agnihotra etc., hospitality to guests, facing worldly odds and pleasures with even mind, procreation and begetting children and grand children (family life emphasised). Further this verse says, According to truthful Raathithara, he says, truth must be observed as priority. According to great penance performer Paurushishti, perseverance/penance (Tapas) should be observed. According to Naka the son of Mudgala, studying/learning-teaching of Vedas (Swadhyaya and Pravachana)should be observed.
So there seems to be three teachers emphasizing on one of the aspects of ideals of pious life. This part of the verse lead some scholars think that there was a difference of opinions on way of life leading to divine knowledge/realization at time of composition of this Upanishad.
All through this anuvak, emphasis is laid on continuous study, learning and teaching of Vedas to students. This is termed as Swadhyaya and Pravachana.
Eleventh Anuvak is a set of instructions that teacher(Acharya) gives to his disciple after the completion of vedic education and the disciple is about to start a household life. In this anuvak we find famous saying "Matrdevo bhava" which emphasizes on reverence to ones mother, father, teacher and guests. Here teacher ordains disciple as follows.
Tell truth always, observe Dharma or (eternal divine laws), continue progeny, never leave truth, never leave Dharma, never abandon care of your health, never abstain from good rituals ordained in scriptures, never leave study/learning and teaching, never abandon worshipping gods (Deva's) and revering ancestors (Pitru's). Treat mother as a God. Treat father as a God. Treat your teacher as a God. Treat guests as Gods. Those deeds, rituals that are good and lauded by people should be done. Have reverence for great men, sages and wise ones.
Engage in charity work with diligence, donate according to your wealth, donate with faith, donate with humility. Donate with friendliness (not belittling the receiver); in case of any doubts about performing these duties, follow as do the selfless, kindhearted sages do.
Finally to emphasize that these duties are to be performed with greater importance and due care, the verse states, This is divine ordain and divine commandment.
Forming the gist of these two Anuvaks, one can guess what kind of life a house holder, aspiring divine knowledge tried to lead at the time of this Upanishad.
Read more about this topic: Taittiriya Upanishad