Mental Math Cards from Teaching 4 real. Students are working on a lot of different number operation skills with this game and this can also be made into a game that goes around the class and each student can have a different card.

Self-Assessment Strategy- students use cards to indicate how they are progressing through the independent practice. This allows the teacher to intervene when necessary and gauge students' understanding of concepts.

I've got a foldable for that!: Math Important Book - sequences and square roots I like the idea of using foldables to teach expectations. Interactive way to go over the "rules" at the beginning of the year.

N/S: DIY Rekenreks. Instructions for making a class set of rekenreks. Includes a materials list, step-by-step instructions, and a link to a free book on using rekenreks.