"The prism will deflect the red and orange, and form a reddish colored image at n. The violet, indigo, blue, green and yellow light, not caught by the prism, will unite at f to form a greenish image. When the prism is removed, the reddish light that fell at n, and the greenish light that fell at f, unite to form white light." -Avery 1895

Refraction of Complimentary Colors

"The prism will deflect the red and orange, and form a reddish colored image at n. The violet, indigo,…

An illustration of 1 stick that can be used when teaching counting, grouping, and place value.

1 Stick

An illustration of 1 stick that can be used when teaching counting, grouping, and place value.

An illustration of a bundle of 10 sticks that can be used when teaching counting, grouping, and place value.

10 Sticks

An illustration of a bundle of 10 sticks that can be used when teaching counting, grouping, and place…

An illustration of a bundle of 100 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

100 Sticks

An illustration of a bundle of 100 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 1,000 sticks bundled in hundreds that can be used when teaching counting, grouping, and place value.

1000 Sticks

An illustration of a bundle of 1,000 sticks bundled in hundreds that can be used when teaching counting,…

An illustration of a bundle of 11 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

11 Sticks

An illustration of a bundle of 11 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 12 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

12 Sticks

An illustration of a bundle of 12 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 13 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

13 Sticks

An illustration of a bundle of 13 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 14 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

14 Sticks

An illustration of a bundle of 14 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 15 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

15 Sticks

An illustration of a bundle of 15 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 16 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

16 Sticks

An illustration of a bundle of 16 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 17 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

17 Sticks

An illustration of a bundle of 17 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 18 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

18 Sticks

An illustration of a bundle of 18 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 19 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

19 Sticks

An illustration of a bundle of 19 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of 2 sticks that can be used when teaching counting, grouping, and place value.

2 Sticks

An illustration of 2 sticks that can be used when teaching counting, grouping, and place value.

An illustration of a bundle of 20 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

20 Sticks

An illustration of a bundle of 20 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 200 sticks bundled in hundreds that can be used when teaching counting, grouping, and place value.

200 Sticks

An illustration of a bundle of 200 sticks bundled in hundreds that can be used when teaching counting,…

An illustration of a bundle of 21 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

21 Sticks

An illustration of a bundle of 21 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 22 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

22 Sticks

An illustration of a bundle of 22 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 23 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

23 Sticks

An illustration of a bundle of 23 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 24 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

24 Sticks

An illustration of a bundle of 24 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 25 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

25 Sticks

An illustration of a bundle of 25 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 26 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

26 Sticks

An illustration of a bundle of 26 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 27 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

27 Sticks

An illustration of a bundle of 27 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 28 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

28 Sticks

An illustration of a bundle of 28 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 29 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

29 Sticks

An illustration of a bundle of 29 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of 3 sticks that can be used when teaching counting, grouping, and place value.

3 Sticks

An illustration of 3 sticks that can be used when teaching counting, grouping, and place value.

An illustration of a bundle of 30 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

30 Sticks

An illustration of a bundle of 30 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 300 sticks bundled in hundreds that can be used when teaching counting, grouping, and place value.

300 Sticks

An illustration of a bundle of 300 sticks bundled in hundreds that can be used when teaching counting,…

An illustration of a bundle of 31 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

31 Sticks

An illustration of a bundle of 31 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 32 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

32 Sticks

An illustration of a bundle of 32 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 33 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

33 Sticks

An illustration of a bundle of 33 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 34 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

34 Sticks

An illustration of a bundle of 34 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 35 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

35 Sticks

An illustration of a bundle of 35 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 36 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

36 Sticks

An illustration of a bundle of 36 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 37 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

37 Sticks

An illustration of a bundle of 37 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 38 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

38 Sticks

An illustration of a bundle of 38 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 39 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

39 Sticks

An illustration of a bundle of 39 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of 4 sticks that can be used when teaching counting, grouping, and place value.

4 Sticks

An illustration of 4 sticks that can be used when teaching counting, grouping, and place value.

An illustration of a bundle of 40 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

40 Sticks

An illustration of a bundle of 40 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 400 sticks bundled in hundreds that can be used when teaching counting, grouping, and place value.

400 Sticks

An illustration of a bundle of 400 sticks bundled in hundreds that can be used when teaching counting,…

An illustration of a bundle of 41 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

41 Sticks

An illustration of a bundle of 41 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 42 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

42 Sticks

An illustration of a bundle of 42 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 43 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

43 Sticks

An illustration of a bundle of 43 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 44 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

44 Sticks

An illustration of a bundle of 44 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 45 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

45 Sticks

An illustration of a bundle of 45 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 46 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

46 Sticks

An illustration of a bundle of 46 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 47 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

47 Sticks

An illustration of a bundle of 47 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 48 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

48 Sticks

An illustration of a bundle of 48 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 49 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

49 Sticks

An illustration of a bundle of 49 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of 5 sticks that can be used when teaching counting, grouping, and place value.

5 Sticks

An illustration of 5 sticks that can be used when teaching counting, grouping, and place value.

An illustration of a bundle of 50 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

50 Sticks

An illustration of a bundle of 50 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 500 sticks bundled in hundreds that can be used when teaching counting, grouping, and place value.

500 Sticks

An illustration of a bundle of 500 sticks bundled in hundreds that can be used when teaching counting,…

An illustration of a bundle of 51 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

51 Sticks

An illustration of a bundle of 51 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 52 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

52 Sticks

An illustration of a bundle of 52 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 53 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

53 Sticks

An illustration of a bundle of 53 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 54 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

54 Sticks

An illustration of a bundle of 54 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 55 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

55 Sticks

An illustration of a bundle of 55 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 56 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

56 Sticks

An illustration of a bundle of 56 sticks bundled in tens that can be used when teaching counting, grouping,…

An illustration of a bundle of 57 sticks bundled in tens that can be used when teaching counting, grouping, and place value.

57 Sticks

An illustration of a bundle of 57 sticks bundled in tens that can be used when teaching counting, grouping,…