recovery pdf - How to repair bad PDF book? Fix corrupted PDF instructions.

Repair PDF - How to fix corrupted PDF files? Extract information from ureadable PDF files.

repair pdf - How to repair damaged pdf file online? How to repair PDF file damaged could not be repaired?

.. Sitting at home or in school office, where you have a personal computer, first-year student program includes a "definite integral". Lecturer, reader for a hundred or more students cannot adjust to the speed of perception of each, and a personal computer PC - can. So he called the personal, what works with each user individually. One student - sanguine, perceives information quickly learns the topic for an hour and a half. Other - phlegmatic - slowly, at his request a personal computer PC repeat the individual steps explained by changing the wording to lead another example, offer to do extra exercise to solve another problem. Phlegmatic learn the subject for two or even three hours. However, both students will learn subject firmly, because the computer provides constant feedback to the learner, constantly asking questions and setting the reference rate of learning, depending on the answers to these questions, the success of problem solving.
And if a student, after sitting at a computer three or four hours, tired, he can switch the program, and the same personal computer PC or offer him TV newspaper detective story, page after page which you can read
on the screen (or listen to the announcer will read) ...
Hundreds of thousands of teachers to teach children their native language conduct dictations. Tens of millions of school children use up hundreds of millions of books. Thousands of tons of high quality writing paper go to waste paper.
But today you can keep the vocal cords and get teachers to dictate the tape recorder. Moreover, the headphones can give each student a variety of texts. "Writing," students can dictation on the screen using the keyboard, when necessary, he will be able to make amendments. And by switching on the completion of the work immediately on the screen will read, how many and what mistakes he made, which deserves evaluation.
If the student does not paint a very competent, he can after school to work individually. The recorder will never tire of dictating to him more and more texts. Moreover, compiled with the participation of the leading trainers program noticed that most of the errors the student - for spelling unstressed vowels, and will offer specially designed for this case dictation.