Immature Expression vs. Inner Feelings
Children criticize, complain, ridicule, get angry, are
 intolerant and embarrass. However, these modes of expression do not necessarily
 reflect their true feelings and desires. Their state of immaturity prevents them
 from speaking and acting in accordance with their inner selves.
Children’s yetzer hora urges them to search for faults
 in others, especially in their teachers. They diminish the importance of others
 in order to give themselves a sense of security. Why? For the feeling of
 security comes with accomplishments and children have not yet gotten enough of a
 chance to achieve serious accomplishments. By insulting others, etc., they, in
 getting the upper hand, are looked up to by friends for their "accomplishment"
 and gain a sense of security.
Sometimes children just test their own modes of expression,
 whether physical or vocal, in order to test the acceptable social borders. In
 the classroom, they test their teacher to see how far he will let them go.
Children have not yet tasted the benefits of seriousness,
 dedication and responsibility and therefore do not appreciate them. Rather, they
 cling to their present state of immaturity, and enjoy it, for they are familiar
 with that and it fills them with a (false) sense of security.
The truth is, all people naturally cling to their present
 level, whether physical or spiritual, and resist change or alteration.
In children, this is more acute for they have not only to
 change in relative standing but from one type of standing to another.
The way a parent can help his/her child pass over this
 difficult period is to increase expectations of him/her for at least 6 months
 before the change in status whether from child to adult or from young adult to
 mature young man/woman.
See in our parsha (31:2) where Rashi emphasizes the seemingly
 contradictory reactions of the Jewish people toward their teacher Moshe, and
 explains that although they reacted brutally to Moshe Rabeinu at first, when
 they heard the news of Moshe’s impending death, they became humbled and
 completely uprooted all negative feelings toward him. This shows that their
 previous feelings and reactions were superficial.
In Hashem’s command to Moshe to avenge the crimes of Midian,
 he was informed that his very fulfillment of the mitzvah would lead to
 his immediate demise. When the people heard this, they refused to join the war
 effort, explains Rashi, for they, in actuality, loved their Rav and leader,
 Moshe Rabeinu. Rashi says that the word וימסרו is used (in place of ויבאו, ויקחו
 or simply והיו) for it implies that the soldiers were forced to
 prepare themselves for war.
In addition, we can suggest that the word "וימסרו" is used
 for it alludes to a מסר or message the people wanted to relay to Moshe Rabeinu-that
 they loved him and certainly did not want him to die.
Also, we can say that וימסרו denotes מסירות נפש-as it is
 translated by Targum Yonason ben Uziel, for the people were ready and
 willing to sacrifice their lives, rather than be part of a process that would
 lead to the demise of Moshe. (See Ba’al Haturim.)
The posuk reads "וימסרו מאלפי ישראל…" ("And they were
 chosen from the thousands of Israel…") and does not simply say the number of
 soldiers, to imply that the love for Moshe Rabeinu was shared by all. (See the
 Kli Yakar.)
This initial refusal to fulfill Moshe’s command was itself an
 act of great effort, as those chosen to fight against Midian were quick and
 decisive by nature, as Onkelos translates חלוצים as מזרזי or quick. They
 held back their strong natural desire to quickly fulfill the mitzvah in
 order to lengthen the life of their Rav, Moshe Rabeinu.
Actually, it appears that this change in attitude on the part
 of Am Yisroel is alluded to in the way Hashem describes Moshe’s impending death
 as "…אשר תאסף אל עמך" ("…afterward you will be gathered to your people")
 instead of "אחר תמות" ("afterwards you will die"). This teaches us that the
 nearing of Moshe’s death through the war with the Midianites would "gather in"
 or strengthen Moshe’s relationship with his people.
One Rosh Yeshiva told me the following incident which shows
 that this relationship between Rebbe and student still exists today.
During the year, a number of students had the habit of
 complaining about the food and other things in the yeshiva. sometimes, the
 complaining and the light talk that accompanied it got out of hand and other
 students would join the choir of chronic complainers. At times, the complaining
 caused great friction between the staff and the students.
At one point, the Rosh Yeshiva had to travel to another
 country to raise funds for the yeshiva. While he was gone, he worried about
 friction between the staff and students, being unable to do anything about it.
Upon calling the yeshiva to see how things were going, he was
 surprised to hear a report that the students, even the more critical and vocal
 ones, had absolutely ceased to complain. When the dumbfounded Rosh Yeshiva asked
 his staff for an explanation, they told him that the students, upon seeing that
 their Rosh Yeshiva had to leave his family and the yeshiva and fly to another
 country to raise financial support, felt the sincerity and the sacrifice of the
 Rosh Yeshiva and decided that it was improper to complain.
This story so beautifully illustrates the true inner love
 students have for their Rebbe and Rosh Yeshiva.
With this in mind, when a Rebbe is confronted with a
 difficult or even combatant class or individual, although on one hand he should
 be strict and decisive, at the same time he should not see the child’s or
 children’s speech or actions as stemming from hate or contempt, but from a
 superficial and impulsive response.
A Rebbe who has developed a good relationship with his class
 and devotes himself to the betterment of his students can rest assured that deep
 inside his students truly love and respect him.
This feeling gives the Rebbe the strength and the good spirit
 needed to maintain order in the classroom, to impart lessons in good behavior
 and to teach Torah. All this without being over-concerned with his student’s
 childish comments or behavior.
In any case, a child’s comment is not be taken personally
 under any condition. Once the Rebbe gains experience and sees his students grow
 and mature, he will better be able to withstand the irritating comments of his
 future students and be able to teach them and guide them in the best manner
 possible.
