Cathy Duffy wrote a sidebar about that too in one of her Curriculum Manuals.
But after ten-plus years of homeschooling, you tend to end up with a lot more "stuff" than that. I made a list this weekend of what we have that Crayons could use for next year's Real Grade One Math. (We also have access to a whole world of mathematics books, games, blogs, lesson plans and more through the public library and the Internet--but you can't count that, can you?) I've sorted it more or less by category:
Official Math Stuff: Miquon Math teacher's manuals and workbooks. Developing Number Concepts Using Unifix Cubes (yard sale treasure ten years ago, but it took me years to find some Unifix cubes to go with it; we used Duplo instead). A Calculadder set for drilling facts (although we don't drill much at this level). Miscellaneous yard-sale workbooks, although most of them aren't at a grade 1 level.
Other math books: Mathemagic (from the Childcraft series), Family Math, Teaching Children (for a scope and sequence), Ruth Beechick's booklet, and a book called How is My Second Grader Doing in School?, which isn't for first grade but is quite useful anyway. (That's where I found the evaluation exercises I used last week.)
Manipulatives: a plastic shoebox full of Cuisenaire rods (4 74-rod sets plus a sandwich bag full of ancient thrift shop rods), one set of base-10 blocks (teacher's yard sale) , a set of linking cm cubes the same size as the units in the base-10 blocks, a small set of Unifix cubes (same yard sale) and a small set of larger linking cubes (same yard sale). A homemade abacus, although we don't use that really until later. Miscellaneous pegs and beads, Lego and Duplo blocks. Coloured popsicle sticks (those are popsicle sticks in the photo, not Cuisenaire rods. Just watch out for splinters--ask us how we know). The rubber numeral tiles from a Scrabble-type game called Ready or Not.
Number lines: metric measuring tape, ruler
Hundred Charts: several including our homemade Velcro-poster board masterpiece. Also the 1-100 Activity Book from Learning Resources. (Good for games.)
Our Jumping Number Line.
Kitchen measuring equipment: measuring cups, scale. Also a small plastic "grocery clicker" from the days before calculators. Miscellaneous recyclables like egg cartons and toothpicks.
Geometric solids: a folding cardboard set that came from somewhere, sometime; plus building blocks, food cans, balls, etc.
Geoboard: we don't have one, so we use an upside-down Discovery Toys Giant Pegboard and a bag of rubber bands. (There are a few geoboard activities in the Miquon First Grade Diary.)
Miscellaneous pieces of paper with numbers on them: bills, maps, newspapers and catalogues.
Household and office stuff: Paper, file cards, pencils, ruler, scissors, markers, rubber bands (for bundling popsicle sticks and doing geoboards). Small chalkboard and chalk; small whiteboard and markers.
Commercial board games (and all their pieces, dice, play money, rubber tiles): Monopoly Jr., Ludo, Snakes and Ladders, checkers, Chinese checkers, Sorry, Battleship, Can't Stop, and a domino-like game that I think was called Make Tens. The Klutz Book of Classic Board Games--which is a pouchful of small black and white pebbles and a set of boards to play games like Mancala and Nine Men's Morris. Miscellaneous dice, dominoes and cards for made-up games.
Homemade felt board, scraps of felt and construction paper, and yarn. Why yarn? Because with a few paper or felt circles and a piece of yarn wrapped around the middle of the felt board, you instantly create a giant domino, which is very useful for showing more/less, odd/even, or adding the dots on one side to the dots on the other side.
A calendar, and Calendar Math from Creative Teaching Press.
Play money and real money.
Plastic fraction wedges from the dollar store--just the half and quarter sizes for Grade One.
A toy clock (and real clocks.)
And a few geometric things to play with (some of which Crayons won't really get into until she's older): half a set of pattern blocks (bought from a friend), a tangrams set, and a set of logic blocks (Logix) that belongs to Mr. Fixit.
[Followup Post: And What Do You Do With It?]