Reviewing is essential for successful test scores and long-term memorization.

What is the review?
Reviewing is one of the best study techniques and in some cases they remain in the background due to lack of time or because they study at the last minute.
One is aware that after learning a topic it is very useful to examine oneself to know how much information you remember. Precisely at this point the review is the tool that helps to master a subject in the best way.
Therefore, to review is to check what is remembered to consolidate knowledge and reinforce those that have been forgotten. And therefore the more review a topic is, the better prepared you are for an exam.
When reviewing, it is advisable to do so with strategies that allow progress in the study and move away from oblivion. One of the factors most feared by students. Since with the passage of time all the information that we study with so much effort is gradually eliminated, we learn and memorize. And this is why the review technique was created.

The importance of review
Surely studying and memorizing for one or two hours and at the end you are able to remember the subject studied, but after a week much of that information no longer exists, you have forgotten it.
This is an indication that the brain is a very practical organ and tends to get rid of what it does not use. But there is also another function of the brain that is related to the neural connections that are strengthened when it is reviewed making the subject studied stay longer. So it is important to reinforce what you have learned from time to time so that it does not disappear. In addition, understanding this leads us to get rid of the typical situation of studying one day before the exam because in that case the review is left out and it is precisely the technique that determines the result of the grades throughout each academic year.

The curve of forgetting and review
Forgetfulness refers to the loss of access to information previously processed in memory. In general, this situation occurs due to the passage of time, although in other cases due to a mental block. Regarding the study, it is somewhat annoying despite being a capacity with an adaptive function, which allows us to eliminate information that is not used from our brain and allows us to focus on daily problems.

Herman Ebbinghaus
In 1850, the German psychologist Herman Ebbinghaus conducted the first studies on the function of forgetting and defined what is now known as the forgetting curve.
This study allowed to clarify processes related to the retention of information and the forgetting of it.


Through various experiments, Ebbinghaus graph the forgetting curve where the level of retention of learned information and its decrease over time is reflected. Through the forgetting curve, a comparison can be made between the material that is initially processed and the one that will remain in memory, which according to its creator, occurs due to the passage of time and the non-use of the information.


In this curve it can be seen that forgetting occurs very quickly (red curve)
While with them the information tends to remain (green curves)

In the graph you can see three green curves which represent a review. Therefore, doing a review for 3 days after learning makes the information is kept for more than 6 days, almost in its entirety. This means that the retention of the information lasts longer with subsequent review.

Ebbinghaus results
Ebbinghaus showed that the forgetting cycle is as follows:

In one day, 50% of what has been learned is forgotten
In two days 70% of learned is forgotten
After a week, 90% of what has been learned is forgotten
Thanks to this study, the spaced review What is a method to transfer information to long-term memory is recommended. The recommendation for a good spaced review is the following.

First review the next day
Second review a week
Third review after 30 days
Fourth review before the exam or in the next 30 days.
If you want to do a good spaced review, I recommend the Aniki program, which is based on this method.

How to review?
As for review material, it is important that you use the study technique that works best for you, such as a summary, concept map, or any other way. The important thing is that you are entering that the review is fast therefore avoid large amounts of information.
All this is to optimize time due to the large amount of material used in university studies. You can also rely on programs such as: PowerPoint, Word, Anki, a whiteboard or a tape recorder.

Best Review Techniques
Visual review
In this type of review, diagrams or maps are reproduced as they were memorized. This is a technique that helps students who have more facility for visual learning and enjoy

still writing and drawing. It is also important to build knowledge in the initial reviews.

Reviewed aloud
It consists of recording yourself giving a lesson out loud as if you were an expert on the subject, it allows you to develop your oratory and at the same time retain more information. The moments in which you do not know how to explain a topic serve as a progress meter, since they are points that you must read and understand again. This type of technique allows you to structure the content, it helps you develop auditory learning. It also gives you the advantage of recording the conference and listening to it as a review instead of reading.

Reviewed with cards
This is a type of review that became very famous or to memorize vocabulary, definitions and formulas. It is more practical, since it allows you to develop the cards as you study or prepare the study material. The fact that you have a very small space allows you to select the most important and pay close attention to the keywords. If you choose an application to carry out a review with cards, you can do it in any empty time.

Review with exams
This is considered one of the most effective reviews to face exams. To carry them out you can request exams from previous years students who have already taken or ask your classmates to make you a difficult exam. This allows you to evaluate their progress by simulating real exams and clearly visualize what concepts they need to review. In addition, the fact of taking a mock exam prepares you mentally for a real situation and many times you can find similar questions.