Helps for the assignments:

Thursday's assignment:

Take Away Result Unknown direct modeling: See separate from on the page of direct modeling strategies

The counting strategy that is similar to the separate from direct modeling strategy: "Counting back", or "Count back by". Scroll down to the section Counting back to subtracton this page on counting strategies.

Using Part-Whole Language for subtraction: A helpful essay is here.

Math Mountain examples are here.

Counting up is discussed on the page of counting strategies. Scroll down to the section Counting up to for subtraction. You should be writing either an Add To Change Unknown or a Part-Part-Whole Part Unknown word problem.

Representations: Ten-frames: this Learn-Zillion example is pretty good. , difference on a number line (subtract by adding up), difference by comparing (use either a direct modeling picture or a bar graph picture), hiding (describe the Octopus game for subtraction or read the subtraction examples with bears in a cave on the page of counting strategies.

Friday's Assignment:

1a. Add on using a number line
b. Add in place values
2. a. Add up to subtract on a number line
b. Subtract using negative numbers
c. Shifting the number line
3. Subtract highest place value and compensate.