In this bundle each week of each unit in National Geographic Reach for Reading has a page of the six Nat Geo sight words for your students to read, write and stamp. This is great practice for students to work on independently while you work with a group of students on reading skills. I have included a page with no words listed at the end in case you'd like to fill in or have students fill in any other words.
Here's a link to my free resource, with all the National Geographic Sight Words listed, these are the words used on the Sight Word Stamp pages in this product. https://www.teacherspayteachers.com/Product/National-Geographic-Reach-for-Reading-First-Grade-Sight-Word-List-1997927
We use the lowercase letter stamps from Lakeshore Learning Company on this page and they fit on the page well. I have listed the link. The stamps sell for $12.99 a set. You only need 2-3 sets for a small group to share. I do not work for Lakeshore but this is the product I use that works well on this page and I think these are great to have in a primary elementary classroom for word work practice. http://www.lakeshorelearning.com/product/productDet.jsp?productItemID=1%2C689%2C949%2C371%2C929%2C561&ASSORTMENT%3C%3East_id=1408474395181113&bmUID=1497480188114