Educational institutions in West Bengal were closed for two years due to the pandemic. It has finally been opened to students in primary schools from February 2022. But the education department has brought a special bridge material to fill the gap of two years of study for the students. This bridge material has the concept of important topics of the previous two classes. This bridge material is named " Shekhar setu" (শেখার সেতু) . "Shekhar Setu" (শেখার সেতু) textbooks or bridge materials will be provided from first grade to fifth grade. Students must complete the Sekhar setu (শেখার সেতু) bridge material textbook within 100 days, after which the students must read the original textbooks. Subject Class Video Link Shekhar Setu Our Environment  (Bengali version, শেখার সেতু আমাদের পরিবেশ ) 1 to 5 https://youtu.be/GahDsBnnzNM Shekhar Setu Our Environment  (English Version) 1 to 5 https://youtu.be/pxVbDOwFRHA Shekhar setu Mathematics (Bengali version, শেখার সেতু