Printed materials <s>in</s> for learning
Nowadays, <s>being</s> with electronic devices part of everyone's daily life, issues concerning the use of online reading material<s>s</s> for childre<s>a</s>n are increasingly rising [alternative: on the rise]. Despite the fact that some people believe that online reading material<s>s</s>** should be used for teaching a child how to read, in my opinion this is not <s>be the </s> <s>better </s>ch<s>i</s>oice [alternative: the best choice]
<em>** Throughout your essay you write: reading materials and printed materials (plural). I think singular sounds better, so I've x'd out the "s" throughout. That said, I don't think your'e grammatically wrong making these references plural. I think it's just a matter of personal preference.</em>
Firstly, spending too much time on electronic devices badly effects the health of a child. As a matter of fact, the small <s>dimension of the letters</s> font on tablets may damage their eyesight. Moreover, the light of the device not only <s>does </s>can cause headaches frequently, but it can also make a child hyperactive and consequently give them trouble falling asleep.
Furthermore, losing concentration is much easier <s>on</s> when using an electronic device than it is <s>on</s> when using printed materials. Tablets, smartphones, and computers are often considered merely as a game by children** and not associated with the idea of learning and studying.
<em>**</em><em>Tablets, smartphones, and computers are often considered merely as a game by children.</em><em> Here you are equating tablets/smartphones/computers with games. Which would mean game should be plural, I think. But, I'm not sure that's what you want to say. The devices are games? Or using the devices is like playing a game? It's a tricky sentence.</em>
In addiction to it,[<--I don't think this is necessary] Nowadays people are surrounded by technology and they should allow themselves a break. Children, for instance, <s>during most part of the day </s>watch tv most of the day, play videog<s>r</s>ames, or play on their <s>own</s> tablets; reading <s>on</s> printed material<s>s</s> may give them a break from technology, as well as their parents.
On the other hand, people often suggest that reading on electronic devices reduces the use of paper and it is therefore better for the environment. However, [<--I don't think this is necessary.] It seems to me that electronic devices may damage the environment even more than books as they are not recyclable materials.
<s>As a</s> In conclusion, the advantages of using printed material<s>s</s> are significant: they are <s>more healthy </s>healthier, help children keep<s>ing</s> concentration, and give them the opportunity to <s>have</s> take a break from technology. However, it is true that the environmental sustainability of printed material<s>s</s> s<s>c</s>hould be improved and it is high time books were made only from recyclable paper.
(P.S I'm trying to improve my ability in writing essays. I would really appreciate if you can help me sound more natural and English as possibile).
Good job!