Hundreds of Portland residents crowded into a Portland Public Schools board meeting Tuesday to protest proposed school closures, with some pushing past an attempted effort to hold back the crowd at the district headquarters entrance. The meeting room, which holds about 300 people, was already full as parents, students and teachers prepared to give hours of testimony. Video from the gathering shows a man wearing a “campus safety” shirt trying to block the doorway before the crowd pressed forward and he moved aside. More demonstrators chanted outside. People entering the building carried signs calling on the district to keep schools open. The protest followed the district’s Monday release of two possible plans that include closing up to 14 schools, changing attendance boundaries and shifting programs. The proposals could reshape operations at as many as 42 of the district’s 81 schools, directly affecting students, educators, staff and families. The district formally presented the scenarios at Tuesday’s meeting, beginning a debate expected to continue over the next two and a half months. The plans put families and school communities in a high-stakes discussion about where students will learn and how district programs and boundaries may change. No final closure decisions were reported Tuesday.