These "Measurement Challenges" can be used for science centers and/or for enrichment for gifted students. The challenges include units of measurements that are not often used and other ideas that might not have been covered in the regular curriculum. The challenges are ideas for projects, but the product is not specifically specified. Students can choose how they'd like to present their work. A work log is included, which has students document how they are progressing in their projects and using their time in class.