 अब the question is why to compare learning achievements, why do you want to do it? You want to do it because you want to measure the achievements in relation to other countries. You want to measure the learning achievement of students within the schools and you also want to compare learning achievements in relation to other countries. You want to measure the learning achievement within the schools and you also want to do a kind of comparison with other schools. अप ये देखना जातें के कोस्ट बेनेफिट एनालिसस क्या है अब ये कोस्ट बेनेफिट वाली चीजें जोएं ये गरमेंट लेवल पे और मिनिस्ट्रीस में पीपल आप वेरी इंट्रस्टीट तो डोड़ाद अ जो बना आप वैस्ट इं एक आजुकेशन उना इस पे इतना पेशा लगा याई या वो कोई सिस्टम लेग रहे कर आई तो उसका उसके अप पेशा कितना आर हाे और बच्चे फसे बच्छों को उसके अपर कितना फपएदा आर है और ये चीजीज आप जो अक्रोस कंट्रीज में इस लिए करना चाते हो, कुई आप देखना चाते हो, at times you want to not just look at learning achievements. लेएकिन कैई तवा आप ऊन लानिन अज्विमन्त सो को रेलेट करना चाते हो, दॉसरे असक्प्त से, by what input processes and what teaching learning dynamics they are taking. एक वजा है एक भाईगर। यह सकता हैं पास इस ण्लीग है। तिर तो प्तरनागा। अपको प्रहींगन ट्रीट प्लेग स कुल्ल। ठाद लूगी प्रहाताा फाब प्रहाताद मिट्र्जा रागा aus ऐसलग प्रहाता आपार ही हो प्रहाता है। जितनी आदर को दूसरे दोमिनेंट कोम्युनिटीस कर रहीं और आप देखना जातो इसी तरा पाकिस्तान में भी, at times you want to do my compare gender, at times you also want to see that the ethno-linguistic minorities are in your schools, or the religious minorities you have, are they performing equally well, learning achievements are equal to their dominant group or not? and you also want to learn actually, and we can sum up it in a way, what can we learn from other systems, we do comparisons because you want to see that what is there for us to learn from their system, whether that issue is of equity, i.e. the issue of all groups is that some groups consistently over the years are performing well, or the issue is that some countries are performing well or not, or the differences of rural-urban are coming, you want to see all these differences, when you see these differences in a country, you will see that these are not your issues, where people are performing well despite being a minority, despite their gender, despite rural-urban contrast, so then you want to bring those things to other schools, then you also want to see other countries, to see how they resolve similar issues, and the problems you are facing in learning achievements, whether they are coming or not, and through this comparison you just want to learn, so that you can improve your own system, and because learning achievement is the main outcome of education, at least what you can measure in front of you, literacy related, so that is a lot of research has been done over here.