I wouldn't try to force it. As others have said, they will be learning plenty.
That said, it wouldn't hurt to ask the teachers in advance. One year that we took DD out her teacher just requested that she keep a journal. That was fun because it gave DD something to do each day while the babies were napping and it was good to take some time to reflect about what she enjoyed. Another year her teacher told me that for science the kids would be studying plants so her assignment was to draw some pictures of new and exciting plants she encountered while in FL. Conveniently, our trip was during the Flower & Garden festival. We took pictures of lots of plants and their informational signs and then DD made a book (using the photos for reference for drawing and writing the names).
That said, it wouldn't hurt to ask the teachers in advance. One year that we took DD out her teacher just requested that she keep a journal. That was fun because it gave DD something to do each day while the babies were napping and it was good to take some time to reflect about what she enjoyed. Another year her teacher told me that for science the kids would be studying plants so her assignment was to draw some pictures of new and exciting plants she encountered while in FL. Conveniently, our trip was during the Flower & Garden festival. We took pictures of lots of plants and their informational signs and then DD made a book (using the photos for reference for drawing and writing the names).