DSSSB

Eligibility criteria for teaching positions, such as TGT (Trained Graduate Teacher) positions in organizations like the Delhi Subordinate Services Selection Board (DSSSB), can vary based on the specific requirements set by the organisation and the government regulations in your region.

TGT positions often require a combination of educational qualifications and subject-specific qualifications. The eligibility criteria may include factors such as:

1. Educational Qualification: A bachelor's degree in a relevant subject from a recognised university is often required. In your case, having a B.Sc (Hons) in Instrumentation could potentially be relevant for the TGT Natural Science position.

2. Teacher Training: Many TGT positions require candidates to have completed a teacher training program, such as a B.Ed (Bachelor of Education) in your case.

3. Subject Qualification: Some positions may have specific subject-related requirements. For the TGT Natural Science position, having a background in natural sciences or related subjects could be beneficial.

4. Age Limit: There might be an age limit for applying to teaching positions.

5. Additional Qualifications: Some positions might require candidates to have passed specific teacher eligibility tests or have other relevant qualifications.

The Delhi Subordinate Services Selection Board (DSSSB) is a government organisation that conducts recruitment exams for various posts under the departments of the Government of NCT of Delhi.

The frequency of DSSSB vacancy announcements depends on the recruitment needs of the Delhi government departments. Generally, the DSSSB releases recruitment notifications as per the requirement of the departments, and there is no fixed schedule for the same.

In the past, DSSSB has released multiple recruitment notifications in a year for various posts such as TGT, PGT, Clerk, Stenographer, Junior Engineer, etc. However, the exact number of times DSSSB announces vacancies in a year can vary depending on the demands of the departments and the availability of vacancies.

The eligibility criteria of DSSSB TGT Science is given below.

1. Bachelor's degree (Hons/Pass) with atleast 45% marks in concerned subjects/ combination of subjects and in aggregate.

2. B.Ed. from a recognised university

3. CTET Paper-2 passes by CBSE

4. Working knowledge of Hindi

5. Atleast one subject out of the following should have been at the elective level

A. English

B. Mathematics

C. Natural/ physical science

D. Social science 

The main subjects for TGT Natural science/ Phy. Science shall be Physics, Chemistry, Biology, Botany and Zoology.

So from above, you are not eligible for DSSB TGT Science, because you don't have the main subjects degree like Physics, Chemistry, Biology, Botany or zoology.

Here are some tips to help you prepare for DSSSB Arithmetic and Numerical Ability:

1. Understand the Syllabus: The first step is to understand the syllabus and topics covered in the Arithmetic and Numerical Ability section. This will help you to focus on the relevant topics and prepare accordingly
2. Brush Up on Basics: Arithmetic and Numerical Ability section requires a strong foundation in mathematical concepts and calculations. So, it is important to brush up on basic arithmetic operations such as addition, subtraction, multiplication, and division
3. Practice with a Variety of Questions: Practice with a variety of questions from different topics such as percentages, ratios, averages, time and distance, time and work, profit and loss, etc. This will help you to identify your strengths and weaknesses and improve your overall performance
4. Use Shortcuts and Tricks: In exams like DSSSB, speed and accuracy are important. So, it's important to learn shortcuts and tricks to solve problems quickly and efficiently. This will help you save time during the exam
5. Solve Previous Year Papers: Solving previous year papers is an excellent way to prepare for the exam. This will help you understand the types of questions asked and the level of difficulty. You can also get an idea of your strengths and weaknesses
6. Take Mock Tests: Taking mock tests will help you evaluate your preparation and identify areas where you need improvement. It will also help you to manage your time during the exam.
   

Practicing previous year papers is an important part of the DSSSB exam preparation, but it is not enough to rely on only solving previous year papers.

While solving previous year papers, you will get an idea about the exam pattern, types of questions asked, difficulty level, and time management. This will help you to identify your strengths and weaknesses and to improve your performance.

However, DSSSB exam syllabus is vast and covers a wide range of topics. So, it is important to have a solid understanding of the concepts, theories, and formulas related to each topic. You can refer to textbooks, study guides, and online resources for this purpose.

In addition to studying the concepts, it is also important to practice a variety of questions and test your knowledge regularly. This will help you to improve your accuracy, speed, and confidence.