Ph4 / Russia / Smolensk

New free video tutorials, tests, useful materials and experience in teaching various subjects of the school curriculum, as well as hot news and unique offers for teachers, students and parents can be found in the blog of our project.

Community of professionals.

To

1. Search for people with similar goals and discuss how to achieve these goals faster
2. Create your own interest clubs
3. Publish professional information on RB.ru

The largest educational online project for teachers and educators, students and parents.

Daily visits to more than 1 million people. The site is included in the 20 most visited sites in Russia.

Portal collected:

1. more than 3,000,000 teaching materials,
2. 3476 video lessons in the main subjects of the school curriculum,
3. 132 tests,
4. 89 video lectures on modern educational topics,
5. vocational retraining courses (243 courses)
6. 350 advanced training courses,
7. international competitions and competitions,
8. a catalog of more than 60,000 tutors from Russia, Ukraine, Kazakhstan.

Paid statistics collection and registration.

A graduate student who began to conduct scientific research is constantly confronted with the problem of statistical data processing. All possible criteria: Chi-square criterion or Fisher Criterion, Student's t-test, Wilcoxon's criterion or Mann-Whitney Criterion and when are they eligible? Is it a pair test? Where to get the value of p and when can it be used?

We will calculate descriptive statistics for you (for quantitative variables: mean, standard deviation, standard error of mean, minimum, maximum value, median, lower, upper quartile, confidence interval; For qualitative data: absolute relative value)! We will calculate for you the correlation of all possible combinations of signs! The site will select the appropriate criteria and calculate the value of the statistical significance of the difference in characteristics!

Before the study, it is often necessary to determine the optimal sample size. To formalize the study. For the technical support of the research, the researcher (research organization, commercial organization conducting the research) needs a database for entering and storing questionnaires, operators filling out the database with completed questionnaires, individual registration cards, a statistical department that provides full statistical processing of the data.

• The service will calculate the optimal sample size,
• perform randomization that matches your research plan,
• create a database (MS Access, MS SQL Server) for your research,
• provide double entry in Database of your questionnaires, KFM, qualified operators that is guaranteed to protect you from input errors,
• ...
• professionally draw up a report, taking into account all your wishes!

Online store of seeds, seedlings ...

More than 2000 names of onion and perennial flowers.
More than 2000 types of seeds of vegetables and flowers.
More than 1000 items of ornamental and fruit shrubs and trees.
More than 180 selected varieti