ACM IGDTUW celebrated Computer Science Education Week 2020 by organising a One Hour Session on Standard Template Library in C++ on 9th December 2020. Session was conducted by Srinidhi A., a student of IGDTUW, Research Intern at ETI Labs, was part of Microsoft Engage 2020 and former Flipkart GirlsWannaCode Cohort Member along with Drishti Gupta, a student of IGDTUW, Microsoft Student Learn Ambassador and former Intern at ETI Labs. Session gave a perfect insight into STL containers, iterators, applications and a hands on practice of questions related to their usage. At the end the enthusiastic audience received certificates for their participation.