My language learning experience

My name is Carina. I was born and raised in Argentina. I , and hold a Bachelor degree in Special Education. I have and 8 years of teaching experience which consisted of working with children with cerebral palsy. Due to my husband's job, we moved to Oklahoma, U.S.A. in 2009.
The first few years here, I took English classes in a community college. Mmeanwhile, I was a stay-at-home mom raising my three boys. I worked hard and mastered an intermediate level of English, but my speaking skills were inadequate so inferior and  though I did have the opportunity to practice conversation often so much. That is why To hasten my progress, I started working as a preschool teacher where my children kids were enrolled.
In 2014, we moved to Texas. I start working right away in a small private school. Although, my speaking skills had improved a lot, I still feeling felt nervous and made a lot of making grammar and pronunciation mistakes when I talked.
This year, I have decided to get the Texas Teacher Certification and try to go back to my roots; Special Education. For that, I have to take the English test: TOEFL, before applying for the certification.
I am working hard in on all the sections of the test: reading, listening, writing, and speaking. I can notice how my My reading and listening skills had have improved noticeably, but I still having struggle with my speaking.
I joined to italki to practice my writing and get more confident in developing topics in English.

Correct me

I acquired a strong expertise in different fields, such as microbiology, behavioural ecology, ecophysiology and evolutionary ecology. Concretely, my knowledge of the different techniques, among others, in immunology and physiology, (among others) will not only be extremely beneficial for the achievement of the aims proposed in this project, but will be an excellent complement in for the development of other research carried out at the institution. Hence, I am confident that I can make a major contribution to the host organisation by using my background skills to assist researchers in the department, and by running I can run a project independently when required to do so.

NOTE: If you are using United State's English, organisation should be changed to organization, and behavioural to behavioral. Otherwise, SUPER job. Very complex sentences. I only put the "among others" in parenthesis to break up the rhythm as the sentence was just a tad long. 

Start

Hello. My name is Alex. I hope to improve my level in English. Right now, my level is "Elementary". I can read simple text, and sometimes even books (like Harry Potter). I can watch movies in English as long as they have with subtitles. But I have problems with grammatic, grammar. I can’t understand perfect tense  time rules, and I am simply simple not sure that I can to construct sentences without errors. And about speaking level I just don’t want to talk. And as far as speaking goes, I just don't want to do it. (Assume you mean that you are so nervous or unsure of yourself that you don't dare to speak)
Right now I am studying a book called Murphy Essential-Grammar in Use. I I’ll hope to improve my level of my grammar in the future.
I have decided to practice in writing with this site, and hope you will help me with this.

Just 3 sentences

-Don't ask for a raise until you have at least two years of tenure.

- We can't tell how fast time goes by.

-I'll get those pictures developed by next Monday.