Teacher-author Meredith Anderson has created a set of 32 task cards with word problems to review all Grade 4 NBT standards. Each card features a famous landmark.
Place Value Scavenger Hunt by Jonathan Pearson gets kids up and out of their seats to practice a variety of fourth grade skills related to place value: writing numbers in various forms, rounding, and comparing.
To help your students practice and conceptualize numeration skills, check out these fun activities from Scipi. Dots Fun for Everyone will give you fifteen games and three activities using dominos in math. Number Tiles, a 25-page resource, provides fifteen different activities for operations, primes and composites, exponents, and divisibility rules.
Engaging resources like these make my days as a teacher (and students' days as learners) so much more fun! I hope you'll try them!