"When Mrs. Hartwell is out sick and her substitute doesn't show up, the teachers and staff at the school pitch in to help"--Provided by publisher.

Magical sneezes transform Grandma into different Mesozoic Era marine reptiles, and it's up to her grandchildren to track her down, stop her funny business, and finish their reports before the field trip ends. The aquarium rescue centre has never been this exciting. This picture book introduces readers to facts about prehistoric marine life and encourages environmental consciousness through inclusion of ocean facts. -- Adapted from summary on powells.com....

"Omar is going on his biggest adventure yet--a trip to Pakistan! But his excitement about the trip is interrupted by some shocking news: his amazing teacher is not coming back to school, and no one will say why. When Omar and his friends start investigating, the hints they overhear and clues they find lead them to an alarming conclusion--it must be aliens! Omar has a huge imagination, but saving his teacher from aliens seems far-fetched even to him....

When their teacher has to go away for a week, the kids in room 207 plan to "really act up."