This TicTacToe board has nine extension activities based on decimals that will extend students' content knowledge while they work independently. This works very as an independent project for early finishers or can be used in conjunction with stations. Activities included are designed to hit on many levels of Bloom's Taxonomy and encourage creative thinking.
Activities are aligned with common core:
Number and Operations-Fractions 4.NF
Understand decimal notation for fractions, and compare decimal fractions.
6. Use decimal notation for fractions with denominators 10 or 100. For example, rewrite 0.62 as 62/100; describe a length as 0.62 meters; locate 0.62 on a number line diagram.
7. Compare two decimals to hundredths by reasoning about their size. Recognize that comparisons are valid only when the two decimals refer to the same whole. Record the results of comparisons with the symbols >, =, or <, and justify the conclusions, e.g., by using a visual model.
I have used this in my classroom for students who need more structure than a math game, but enjoy showing their knowledge in creative ways. The activities also work really well in a small group where the group can actually decide what they want to do and complete the task together with you. The varied activities and structure allow all students to be successful.