About marutrevino

Guadalupe Trevino is a math teacher, holds a Bachelor´s Degree in Electric Engineering, and a Master Degree in Business Administration (TAMIU). She is a book author and an accomplished motivational speaker. Having worked as a college professor teaching engineering for over 20 years, she has an expertise in technology which has allowed her to develop customized interactive programs for her students.

Attendance Matters

If a teacher tells parents that their children need to come to class every day and to avoid being absent unless absolutely necessary, some parents may consider this an aggressive stance. Some parents find it easier to change teachers than to change their children’s attitude. Sometimes, it is not even the attitude of the children that are at fault, but rather that of the parents, who have no confidence in the children’s ability to perform, and who promote a culture of minimum effort that in effect condemns the students to mediocrity.

That is one of the biggest mistakes they can make,  and of which they will surely regret in the future.

Parents should strive to create in their children the habits of responsibility, perseverance, self-confidence, self-discipline, thinking big, and aspiring to a better future. This will sow the seeds of greatness in their children, so allowing them to stand out and succeed in every endeavor they may pursue.

In contrast, parents who overprotect their children and let them get away with bad habits—such as avoiding responsibility, making excessive excuses to avoid doing any work, behaving disruptively, and having too much leisure time—may inadvertently be condemning their children to failure.

Many high achievers attribute their success to what their parents taught them about how to do things on their own and to their resultant belief that if they try hard enough, they will succeed.

If you, as parents, want your children to succeed, it is important that you believe in them, and promote in them the confidence that they can succeed in anything they set their mind to achieve. Encourage good habits in them—such as working hard, being responsible, and not settling for low or average grades—in other words, endeavoring to be the best they can through constant effort and an unwavering desire to succeed.


Stand and Delivery



The movie Stand and Deliver details the struggles of a small group of math students and their pursuit of excellence. Jaime Escalante is one of those rare teachers whose very presence in the lives of his students makes them change. More than teaching them math skills, we are shown how their teacher makes them believe in themselves and their potential.

The movie is based on a true story and is about a teacher, Jaime Escalante, and his class of math students in a predominantly Latino area of Los Angeles.


My Hero Stories/ Teachers/Jaime Escalante


Changing Your Math ‘Mindset’ Can Boost Your Math Performance

Good friends do not induce you to drugs

Ten years ago, I retired from a be a college-level teacher and started teaching math to middle school students. As a university teacher, I never knew of any of my students who had problems with drug addiction; However, in my first year of teaching math to seventh grade, with much younger students, I had the opportunity to meet a student, whom I love very much, who faced the drug problem in that school year and was able to overcome it. She told me that one of her friends insisted that she take some white pills that she distributed. He suggested that they would make her forget all her problems, that she would really enjoy life, that she would always feel good about herself, and that she could stop taking them whenever she wanted to.

After much insistence, she agreed. From being a regular student, she became a student who did not assimilate anything, who was missing a lot, she was always distracted and with behavior problems and finally failed all the subjects of her school year.

He told me that when he remembered that incident, he always thought of the biblical story of the serpent’s temptation. She said that who she thought was her friend, just wanted to drag her into a bottomless pit of drug addiction and hopelessness. Like the serpent of biblical history, her friend offered her many false things, to tempt her and over and over again, until she was able to vitiate her. I can hardly remember her face, she told me, but when I think of her, her face is transfigured into a snake.

She told me that she was able to overcome the problem of drug addiction when she realized that her life was in ruins, that everything had been a hoax. What he felt had fallen into a bottomless chasm. He told me that drugs had destroyed his life and made his loved ones unhappy. She told me that there was a time just thinking about suicide to leave everything behind. That before he had drugs he had problems, but his vice increased them to make them intolerable, That he had given everything he had to have returned to the time when he was a student who did not consume them. She confided her problem to her grandmother; she told me that they cried a lot together and that together they also asked God to ask her for the strength that would help to get ahead.
That is why I tell my students what drugs are the greatest enemy they have to succeed in life, destroy their future and hope to thrive. They are the easiest way to prison, to poverty, to loss of health, loss of family, marginalization and finally death.

One child asked me if she could die with one-time use of drugs. I answered what I have read of cases of sudden death, but more frequent cases of people suffering irreversible brain damage with a single shot, in colloquial language go crazy. Suggest you check the internet statistics. More than 55,000 people die each year in the United States directly from drugs, there are more than a million people incarcerated for that cause, and countless families live with the martyrdom of having a family drug addict. Which really was not worth trying.
Drugs are bad for both those who consume them and those around them, they hurt them personally and hurt their families and friends. If someone wants to induce you to drugs, stay away from him, since he only wants your harm.
If you have fallen into this serious problem, seek the support of your close relatives, your spiritual guide, your teachers or counselors. Do not give up, always fight to get ahead!

The Halo effect

There is one thing known as the Halo Effect, which is to value people by generalizing traits that seem particularly positive or negative to us. There is a popular phrase that explains it: We tend to judge a book by the cover.

In psychology, it is known as cognitive prejudices. It means that you do not think that you know what someone or something is until you see and know that person or thing. This effect explains the greater success in the life and studies of attractive people, and in those that always look to make a good impression on others.

The first perception counts a lot in the long run. If the teacher encounters a number of defects in a student, for example, lazy, sloppy, rude, irresponsible, this will most likely be reflected in grade levels throughout the school year. It is very difficult to remove that first impression from others. Many times we only see the features we want to see. When judging an action, it counts a great deal on the perspective of the one who looks at it. We often get carried away by prejudices.

Our actions towards others, even from the first contact, impact their beliefs towards us and are often the cause of their actions, which often reinforce the influence of the original perception.

Often, the personal opinion of the teacher in evaluating the student is reflected in the evaluation of the student’s school performance. If they see you as an angel, they will treat you like an angel. But if they see you as an imp they will treat you as such, and most likely will not tolerate even small mistakes and faults in your behavior.

As a teacher of many years, I can testify to you that on more than one occasion, at the beginning of my teaching career, I mistakenly prejudiced more than one student; Thinking something like “this student is very lazy, irresponsible, and does not care about school at all.” However, with time and after getting to him well, I came to value him and to appreciate him sincerely.

I also noticed that when the child feels appreciated and feels worth it, their self-confidence grows, and responds by behaving like the worthy person they really are. Surprising more than one of their intelligence and participatory behavior and their willingness to help other students. When this happens, I often ask the class something like “Why do you think people change? And then add, is it because he changed his brain?, to which the students respond: NO! People change because they changed their attitude!

This is a reality that happens to us in each new school year. In fact, teachers teach us techniques to minimize the distortions in our perception, such as statistical adjustment.

Many times we do not value a person correctly until we have tried for some time and we have discovered what his way of thinking and his personality really is. This also happens in our daily lives. Possibly it has happened to you that just by seeing a person you dislike, and you do not tolerate them, and you think that she does not tolerate you either. Have patience, and learn to seek empathy in others and I guarantee you will not regret it.

Always try to make good impressions, especially at the initial moment. Always take care in how you treat your teachers, your colleagues, acquaintances, and your family. If you change positively, you will undoubtedly see that their treatment of you improves and your relationships with them will be more fruitful.

There is great potential in you. Make sure your teachers and peers really appreciate what you are worth, and appreciate you for being that great person you have inside. There is a rough diamond in you, let the world know your qualities and value you for who you are and how you are.



Do you really want to succeed in life?

If you really want to succeed, the secret is simple: study. If you compare what a worker who just finished High School (which is the basic level they ask for any job) earns, against what someone who has finished a professional career, a master’s degree or a doctorate, the difference really is enormous.

A person who just finished High School has an income that is just at the poverty line. Instead, a professional has the money to live comfortably and fully enjoy their family. Good homes, good cars, good medical care, holidays and all the comforts of modern life. It is estimated that with only four additional years of study the difference in income over 30 years of work is more than one million dollars.

Let’s do some quick accounting; a minimum wage person earns $ 7.25 an hour ($ 58 a day) when he gets a job. If you are sick with the flu and your mom takes you to the general practitioner for a 15-minute consultation, the fee is $ 50, so they can earn $ 200 in one hour (on a good day $ 1,600 or more). In two weeks a professional can earn what a minimum wage employee earns in a year. In addition, the physical effort is very different; it is not the same to be working where every day you are moving heavy things and doing strenuous work, compared to the physical effort of a professional, which in most professions is minimal because it is intellectual work.

Have confidence in yourself, you must believe in yourself; do not ever get defeated. Dare to dream. If you have a dream, pursue it. Set goals and have the courage, determination, and dedication to achieve them. In life, you will always find obstacles and pitfalls, but you must have the will to rise and persevere. Only the one who gives up is defeated.

If you want to be part of a success story – study. Many students do not finish high school because they did not arrive well prepared in their subjects from the previous years. In Middle School, you learn the bases that will allow you to succeed later in your studies. All construction requires a good foundation, and here we are laying the foundations of what you will build tomorrow.

At Middle School, you must create solid foundations in reading, writing, and mathematics. I do not worry about how low your math skills are; I offer you that if you attend class regularly, if you pay attention, if you do the assigned activities and you frankly consult your doubts in order to clarify them, you will learn what is necessary to get ahead in your studies. I have 30 years as a teacher, and many of my alumni are successful; Even former students, some who had never passed a Texas state test, have achieved Commended Performance and then have achieved a professional career.

Success depends on the will rather than the talent. The foundations of your future and that of your family are built today. Dare to succeed.

Honor Roll

I am very proud to recognize the outstanding student academic achievement in the last six weeks.

Congratulations to every hard-working student on these lists.


Parents, Please join us in celebrating our honor roll students for the last six weeks evaluation.

I have a dream

Today we commemorate the day of Dr. Martin Luther King and his struggle for the equality of all human beings. One of his most famous speeches  “I HAVE A DREAM” refers to equal opportunities for all people regardless of race, religion, skin color or economic status.

Today our country is very different from what it was 50 years ago, when Dr. Luther King delivered this speech, precisely because he dared to dream and to express his ideas of freedom and justice for all. His struggle cost him his life but also transformed this nation.

I challenge you to also dare to dream. The childhood lasts a few years and before what you expect you will no longer be in school but working for your sustenance and that of your family. Dream of what you want to achieve for you and your children. Do not put limits to your dreams. Dare to dream big!

Success is intimately related to the decisions and actions that you make every day.

The foundations of future successes are built today, mainly at school, with these small daily actions, such as dedication to study and all the academic activities assigned to you by your teachers.

Reaching a dream requires effort, dedication and perseverance. Many times, there are obstacles in the road, but we must not be defeated when we have a setback, we must always get up, learn from experience and put more effort to demonstrate everything we are capable of.

Write down your dreams with everything you want to achieve in life, set goals, develop an action plan to achieve them and persevere until you reach them.

If you dream it, believe it, and work hard for it you can achieve it.


Early College

The Early College High School provides students the opportunity to receive a high school diploma and two years of college credit (or an Associate degree), free. (The tuition of two years at college worth more than $28,000) Early college students are outperforming their peers nationwide, 90% graduate high school vs. 78% of students nationally; 94% earn free college credit while in high school.

Many of my former students could realize their dreams through the LISD Early College. You can also achieve the success you deserve.

ECHS School

Laredo Early College High School – Where dreams are ignited by the flames of knowledge.

EC today



Four Steps to Problem solving


1 Understanding the problem

  • What are you asked to find?
  • What information do you have?
  • What do you need to find out? (the unknows)

2  Devising a plan

  • How to use given data to find missing data?
  • Decide what steps you need to take to solve the problem
  • Write an equation

3  Execute the plan

  • Use your mathematical tools
  • Check each step of the plan as you proceed.

4  Check your answer

  • Did you answer the questions asked?
  • Does your answer makes sense ? Why?
  • Substitution (Check the solution in the original equation to catch errors)
  • Can you solve it another way?

(George Polya, 1945)


Diana went shopping at a department store. She bought a bottle of shampoo for $3, one hair brush for $6, and a bottle of nail polish for $4. When she paid for her purchases, the cashier gave her $7 in change. How much money did she give the cashier?

We know that she spend:  3 + 6 + 4          (13 dollars)

The cashier gave her $7 in change

We need to find X, the total amount she give the cashier

X – (3 + 6 + 4) = 7

X – 13 = 7

X = 7 + 13

X = 20


20 – (3 + 6 + 4) = 20 – 13 = 7      OK