Your younger sister has asked you for help because she feels she cannot remember class material well enough to get good grades on her tests. Provide three specific pieces of advice that she should consider, making sure that your advice is based on psychological science.

The brain keep memories which it feels related to it. For example. it's more easy to remember the names of interesting people but harder of ordinary people which you met in a party for example. That's because is the sense of importance acting in our brain.

In order to keep essential information, the brain has to realise that those informations are important. In order to do so, a daily recap by homework is important to remember the class material.

Some people has a different way of absorbing information. A schematic representation way can be helpful when the content is massive and overcomplicated. When the content relies on events, as a history class for example, movies and theater are excellent tools to provide a vivid and sensitive approach with the historical events.  

1. Minimize interference

2. Meaningful material

3. Mnemonic devices

Explanation:

In the first aspect, the sister should be advice on how to minimize interference, this include to try to study before sleep and also not to study two unrelated topics together. This means that, her brain would have cool down by the time she is ready for bed, and at that time everywhere would have become calm also, and she will be able to concentrate and assimilate better. Likewise, when she avoid the temptation of reading two unrelated topics together.

In the second aspect which is meaningful material, she should try to create image whether in her heart or on book while reading, this will make it to look real and help her understanding. Also, she should try to apply the concept to her own life, because it will help to understand very well too.

In the last aspect, which is mnemonic devices, this include the use of acronym, shorting the long statements to small words which will help her to remember easily. She can also change it to rhymes or story. All this will help her to remember what she had read.

In the sense, if she can follow these three steps her grades will be improved.

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