Counting 10-99 with Quantities and Numerals
- 9 ten bars and 9 units in a box
- Seguin Tens Boards
- Cards 1-9 which fit into the slots of the Seguin Ten Board
- Floor mat.
- 4 years and older
- To build quantities and numerals in sequence to 99. This is
the final stage in learning how to count.
- The material is taken to the floor mat and
arranged as usual. The teacher asks the child to put one ten bar
by the numeral 10. (She shows him to make the quantities to the
left of the numerals. This is because the cards 1 to 9 will be
slipped over the 0 in turn which is done from the right. The
quantities would be in the way, if they were on the right.)
- The teacher shows the child to make 11 by placing a unit bead to
the right of the ten bar. She then takes the "1" card and slips
it over the 0 saying, "Ten and one is eleven so we write eleven, one 10
and 1." The teacher now shows the child to make 12 by adding a
second unit. She removes the "1" card, turning it upside down on
the mat. She slips the "2" card over the 0 of the ten saying, "10
and 2 are twelve, so we write twelve with a 10 and 2."
- The teacher and child continue to build the quantities and the
corresponding numerals to 19. The unit cards are stacked upside
down when done. The teacher now indicates the quantity, saying,
"Nineteen. Ten and nine are nineteen. We have one ten and nine
units. If we had one more unit we would have ten units, then we
would have two tens. Let us take away the units and put a ten bar
in their place. We now have two ten bars, which are twenty.
We must move them next to the numeral 20." This is done.
The stack of unit cards are turned the right way up. The
quantities and corresponding numerals are built in this way through the
twenties, thirties, etc. to 99. At any point the child can
continue alone if the teacher feels he has understood the exercise.