For increase in knowledge and memory, one should recite these Aayat 21 times daily after Fajr namaz. InshaAllah, their knowledge will enhance.
رَبِّ اشۡرَحۡ لِىۡ صَدۡرِىْ ۙ ٠ وَيَسِّرۡ لِىۡۤ اَمۡرِىْ ۙ ٠ وَاحۡلُلۡ عُقۡدَةً مِّنۡ لِّسَانِیْ ۙ ٠ يَفۡقَهُوۡا قَوۡلِیْ