Educators have several reasons to follow the volatile debate over immigration in Congress--a debate that ground to a halt last week before lawmakers' spring recess. In the long term some of the plans would allow more teachers from other countries to work in schools or change the enforcement of rules governing other school related jobs. More immediately efforts to crack down on undocumented immigrants promised to intensity rallies planned for April 10 across the country. Most students who had skipped school over the previous two weeks to protest an immigration bill passed by the U.S. House of Representatives were back in class this week. The students had rallied against the measure which would make it a crime to be in the country without legal sanction or to help illegal immigrants.